IXL | Percents of numbers: word problems

Percy brought chocolate and vanilla cupcakes to school for his birthday. 10 students decided to take a cupcake, and 90% of them picked vanilla. How many people picked a vanilla cupcake?

students

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Learn with an example

question

Katy has a new beaded necklace. 70% of the 50 beads on Katy's necklace are blue. How many blue beads are there on Katy's necklace?

beads

key idea

A percent is 1 part out of 100.

1%
is
equal
to
1
100
or
0.01.

Proportions can be used to solve percent problems.

part

whole

percent

100

solution

Find 70% of 50.

The whole is 50.

The percent is 70%.

Let n represent the part.

Write a proportion to solve for n.

100

100n

70 · 50

100n

3,500

100n ÷ 100

3,500 ÷ 100

There are 35 blue beads on Katy's necklace.

You could also find the answer by writing and solving an equation:

part	=	percentage of whole

n	=	70% · 50

n	=	0.7 · 50

n	=	35

There are 35 blue beads on Katy's necklace.

Looking for more? Try these:

Lesson: Percents

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Not feeling ready yet? These can help:

H.6Percents of numbers and money amounts

L.3Multiply fractions by whole numbers: word problems

Lesson: Percents

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