Page 274 - Math Smart - 7

Example 1

The large square is divided Into equal parts. What percentage of the square is
coloured? Write in numerals and in words.
a)

d)
inBOBD
m
iriBrjBn
B

Solution
There are 100 equal parts in each large square,
a) Number of coloured parts = 60
60% or sixty percent of the large square is coloured.
b) Number of coloured parts = 20
20% or twenty percent of the large square is coloured.

c) Number of coloured parts = 3
3% or three percent of the large square is coloured.
d) Number of coloured parts = 25
25% or twenty-five percent of the large square is coloured.

e) Number of coloured parts = 8
-S. _ 8x10 _ 80 _ Qrto/
10 10 X 10 " 100
80% or eighty percent of the large square is coloured.

Example 2

The label on the tin lists the amount of protein, fats and fibre in every 100 g of
beans.
100 g
contains:
What percentage of the beans is:
Protetn: 7g a) protein? b) fats?
Fats: 1g
Fibre: 6.2g c) fibre? d) not protein, fat or fibre?
Solution
a) 7 g out of 100 g are protein. So, = 70% of the beans is protein.
b) 1 g out of 100 g is fat. So, = 1 % of the beans is fat.
c) 6.2 g out of 100 g is fibre. So, = 6.2% of the beans is fibre.

i UNIT 12 Percentages