Finding the Whole in a Percent Problem

Determine if you are finding the part, percent, or whole:

12 is 50% of what number?

• Part

• Percent

• Whole

Which proportion matches the following:

34% of what number is 51?

Which proportion matches the following:

What is 90% of 250?

Which proportion matches the following:

2 is 10% of what number?

20 is 80% of what number?

• 25

• 24

• 26

• 20

18 is 40% of what number?

• 45

• 18

• 7.2

• 40

Anita brings 6 dolls to her grandma’s house. These dolls represent 20% of Anita’s doll collection, as shown in the diagram. What is the total number of dolls in Anita’s doll collection?

Mathematical Equivalence

ON

64 is 40% of what number? 

• 160

• 104

• 25.6

• 108

9 is 50% of what number?

• 2.25

• 18

• 0.36

• 27

26 is 5% of what number?

• 1.3

• 2.5

• 25.95

• 520