Page 178 - Math Smart - 7

Spotlight

Fractions can be used to O Divide 3 pizzas equally among 5 people.
describe © How can you share them equally so that
• a part of a whole, for each person gets a fair share?
example ^ of a cake

• a part of a group of
items, for example | Fraction of a quantity
of the girls in the class
Let us learn to find a fraction of a group of objects.
the positions of
fractions on a number The diagram below show 3 red soccer balls and 1 blue soccer ball.
line, for example 1 on
a number line

balls
of
the
We say that | and T of the soccer balls are blue.
red
are
^ RECALL
Example 2
Find the value of each of
the following.
O There are 50 people at a health workshop. 30 of them are men and the rest
a) 1 of 15 = are women. What fraction of the people at the workshop are men? Express
the answer in its simplest form.
b) 1 of 20 =
4
30 men
Solution
c) 1 Of 35 =
d) 1 Of 32 =
8 50 people
Fraction of people who are men = Number of men—
Total number of people

50-
= 3
3 5
5 of the people at the workshop are men.

0 Mimie baked 160 cookies. She gave 120 of the cookies to her neighbours.
What fraction of the cookies did she have left?

Solution
Number of cookies left = 160-120
= 40
Number of cookies left
Fraction of cookies left =
Total number number of cookies
Jm:

1^4
= 1
4
Mimie had J of the cookies left.

UNITS Fractions