Page 150 - Start Up Mathematics_5

Example 4: Convert 114% to decimal. A Challenge!

Solution: 114% = 114 × 1 Convert 96.71% to
100 decimal.

= 114 = 1.14
100
Converting Fraction to Percentage

To convert a fraction to percentage, divide the numerator of the fraction by its denominator.
Then multiply the result by 100 and put the % sign. 0.6

Example 5: Convert 3 to percentage. 5 3.0
5 – 0 ↓
Solution: Step 1: Divide 3 by 5. 3 ÷ 5 = 0.6 3 0

Step 2: Multiply the result by 100. 0.6 × 100 = 60 – 3 0
Step 3: Put the % sign 3 = 60% 0
5
Example 6: Convert 7 to percentage. 0 . 8 7 5
8
Solution: 7 ÷ 8 = 0.875 8 7 . 0 0 0

0.875 × 100 = 87.5 – 0 ↓
7 0
7 = 87.5% – 6 4
8 6 0

Converting Decimal to Percentage – 5 6

To convert decimal to percentage, change the decimal into fraction. Then 4 0
multiply it by 100 and put the % sign. – 4 0
0
Example 7: Convert 0.64 to percentage.

Solution: Step 1: Convert the decimal to fraction. 0.64 = 64
100
Step 2: Multiply the fraction by 100 and put the % sign. 64 × 100 = 64%
100
Example 8: Convert the following decimals to percentage.
(a) 0.3 (b) 0.07 (c) 0.058

Solution: (a) 0.3 = 3
10 A Challenge!

= 3 × 100 = 30%
10 Convert 0.000025 into

(b) 0.07 = 7 percentage.
100
= 7 × 100 = 7%
100

(c) 0.058 = 58
1000

= 58 × 100 = 5.8%
1000

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