Arch bridge in Toledo, Spain

How to use fractions and multiplicatives in Spanish?

By: Natalia Molina Ceballos Thu Sep 18 2025

Fractions and multiplicatives are number expressions beyond and that you need to know to master Spanish. In this post we’re going to focus on these expressions and how to use them as and . Not sure about what these numbers are? Look at the examples below to have a better idea:

La cuarta parte de los estudiantes aprobó el examen final.

The fourth part of the students passed the final exam.

En la conferencia de hoy tuvimos el triple de asistencia.

In the conference today we had triple the attendance.

If you need a refresher on cardinal and ordinal numbers in Spanish, check out: “Numbers in Spanish: How to form and write them?” Now, let’s go over how to make fractions and multiplicatives in Spanish.

What are fractions?

They refer to fractions of a segmentable unit. They can be used as nouns or as adjectives. Let’s see each case in detail.

Fractions used as nouns

In this case, they’re always next to an , , or and followed by a with de ("of"), which specifies what’s being divided:

La mitad de mis ahorros son para mi viaje por Sudamérica.

Half of my savings are for my trip around South America.

Quiero este tercio del pastel.

I want this third of the cake.

Dos quintos de los estudiantes faltaron a clase.

Two-fifths of the students missed the class.

Fractions used as adjectives

When used as adjectives, they are used in the feminine form, since they’re usually followed by the noun parte ("part"):

La cuarta parte de los estudiantes aprobó el examen final.

The fourth part of the students passed the final exam.

Important

Only the word medio ("half") can modify directly the noun that expresses what is being divided, with which it has to agree in gender and number:

Me comí media galfeminineleta.
I ate half a cookie.
Lleva medio pastmasculineel a tu casa.
Take half a cake to your house.

Notice how there is no indefinite article un ("a") after “medio/a.”

Here’s a useful table with fractions in Spanish:

number
noun
adjective

1/2

mitad

half

medio, media

half

1/3

tercio

one third

tercera (parte)

third

1/4

cuarto

one fourth

cuarta (parte)

fourth

1/5

quinto

one fifth

quinta (parte)

fifth

1/6

sexto

one sixth

sexta (parte)

sixth

1/7

séptimo

one seventh

séptima (parte)

seventh

1/8

octavo

one eight

octava (parte)

eighth

1/9

noveno

one ninth

novena (parte)

ninth

1/10

décimo, décima

one tenth

décima (parte)

tenth

1/11

onceavo, undécimo

one eleventh

onceava, undécima (parte)

eleventh

1/12

doceavo, duodécimo

one twelfth

doceava, duodécima (parte)

twelfth

1/13

treceavo

one thirteenth

treceava (parte)

thirteenth

1/14*

catorceavo

one fourteenth

catorceava (parte)

fourteenth

1/20

veinteavo, vigésimo

one twentieth

veinteava, vigésima (parte)

twentieth

1/30

treintavo, trigésimo

one thirtieth

treintava, trigésima (parte)

thirtieth

1/100

centésimo, centésima

one hundredth

centésima (parte)

hundredth

1/1000

milésimo, milésima

one thousandth

milésima (parte)

thousandth

1/10000

diezmilésimo, diezmilésima

one ten thousandth

diezmilésima (parte)

thousandth

1/100000

cienmilésimo, cienmilésima

one hundred thousandth

cienmilésima (parte)

hundred thousandth

1/1000000

millonésimo, millonésima

one millionth

millonésima (parte)

millionth

*From here onwards, you can make the fractions by adding the -avo for nouns and -ava for adjectives.

Important

Only the fractions corresponding to ten, one hundred, one thousand, and one million, and their multiples, can be masculine or feminine when used as nouns.

What are multiplicatives?

Multiplicatives express the result of multiplying a quantity by a natural number. For example, when we say: doble ("double"), triple ("triple"), cuádruple ("quadruple"), etc. They can also be used as nouns or adjectives in Spanish.

Multiplicatives used as nouns

In this case, they’re always masculine; they’re usually used after an and they mean “a quantity X times bigger”:

En la conferencia de hoy tuvimos el doble de asistencia.

In the conference today we had double the attendance.

Multiplicatives used as adjectives

They describe the noun they’re referring to, with which they must in number:

Hay una función doble en el cine.

There’s a double feature in the movies.

Necesito dos camas dobles para los niños.

I need two double beds for the kids.

Here’s a useful table with multiplicatives in Spanish:

number
multiplicative

2

doble
double

3

triple
triple

4

cuádruple
quadruple

5

quíntuple
quintuple

6

séxtuple
sextuple

7

séptuple
sevenfold

8

óctuple
octuple

9

nónuplo
ninefold

10

décuplo
tenfold

11

undécuplo
eleven fold

12

duodécuplo
twelve fold

13

terciodécuplo
thirteen fold

100

céntuplo
hundred fold
Important

The most common multiplicatives are doble, triple, and cuádruple. From nine onwards, they’re rare. In such cases, you can use the cardinal number and the phrase “veces mayor” ("times larger") or “veces más” ("times more"):

Los ingresos aumentaron diez veces más este año.

The income increased ten times more this year.

Bonus track: Collective numerals

As a small present for you, let me add a few collective numerals. These are numbers that mean that several persons or objects are grouped together.

Pay attention to their endings: the ones ending in -a are feminine, as in, una decena ("ten"), and the ones ending in -r are masculine, as in, un par ("a couple").

Some common collective numerals in Spanish are:

  • un par ("a couple, a pair")
  • una decena ("ten")
  • una docena ("a dozen")
  • una quincena ("fifteen")
  • una veintena ("twenty")
  • una treintena ("thirty")
  • un centenar / una centena ("one hundred")
  • un millar ("one thousand")

Let’s see an example:

¿Cuántas personas fueron al concierto? - Un millar.

How many people went to the concert? - One thousand.

All these collective numerals can be pluralized in Spanish when we use cardinal numbers beyond one:

Deme tres docenas de tortilla.

Give me three dozen tortillas.

Important

When a noun follows a collective numeral, you need to join them with the preposition de ("of"):

Solo un par de estudiantes entregó la tarea.

Only a pair of students handed in the homework.

In conclusion

Numbers are used all the time, but with ordinals, fractions, multiplicatives, and collective numerals, the lower numbers are used a lot more frequently than the higher ones. Also, remember that fractions and multiplicatives can be used as nouns or adjectives. So, when used as nouns, don’t forget the article in front and, when used as adjectives, don’t forget to do the agreement with the noun they modify. That’s it on numbers! Don’t forget to check out our activities to continue practicing your Spanish skills!

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