Lesson 5 Fractions of a quantity

To find  $\frac{1}{3}$   of a quantity:

• Divide by 2

• Divide by 3
  

• Multiply by 3

• Add 3

Find $\frac{1}{3}$  of 18:

• 3

• 6

• 12

• 15

Find $\frac{1}{5}$  of 40:

 $\frac{1}{5}$  of 40 is 8.

Find  $\frac{3}{5}$   of 40:

Find $\frac{3}{5}$ of 15:

Find $\frac{2}{5}$ of 45:

Max earns $210 washing 7 cars.

How much does Max make per car?

Find $\frac{7}{10}$ of 300:

To find 25% of a quantity:

(select all that apply)

• Divide the quantity by 4.

• Find $\frac{1}{4}$ of the quantity.

• Multiply the quantity by 2.5.
  

• Divide the quantity by 2.

 $\frac{1}{6}$  of a quantity is 12.
Find the original quantity.