Page 185 - ICSE Math 5

Example 4: Convert the following decimals to percentage.
Top Tip
(a) 0.736 (b) 0.87
To convert a decimal
Solution: (a) 0.736 = 0.736 × 100%
to percentage, shift
736
= × 100% = 73.6% the decimal point two
1000 places to the right
(b) 0.87 = 0.87 × 100% followed by a % sign.
87
= × 100% = 87%
100
Conversion of a percentage to decimal

To convert a percentage to decimal, we remove the % sign and divide the number of percentage
1
by 100 or multiply it by . Then we write the fraction in the decimal form by putting a decimal
100
point two places to the left. Top Tip

Example 5: Convert the following percentages to decimal. To convert a percentage
 (a) 47% (b) 68% to decimal, put a decimal
two places from the right
47 68
Solution: (a) 47% = = 0.47 (b) 68% = = 0.68 in the given number of
100 100 percentage.

Exercise 13.1

1. Write the percentage represented by the following grids.

(a) (b) (c)

2. Shade the indicated percentages in the given grids.

(a) 43% (b) 52% (c) 78%

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