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Question
primary 6 | Maths
| Percentage
2 Answers Below
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It’s like half percentage and half ratio
12% → 48
1% → 48 ÷ 12 = 4
100% → 4 x 100 = 400
There were 400 women at first.
Since ratio of men to women at first is 2 : 5,
We can let number women = 5 units and number of men = 2 units
400 people = 5 units
1 unit = 400 people ÷ 5 = 80 people
2 units = 80 people x 2 = 160 people
So there were 160 men initially.
= 400 + 160
= 560
Since the number of people increased by 20%
Total number of people in the end
= 560 x 120/100
= 560 x 6/5
= 672
Number of men in the end
= 672 - 400 - 48
(taking away all the women from the total)
= 224
Percentage of people in the end who are men
= 224/672 x 100%
= 1/3 x 100%
= 33⅓ %
See 2 Answers
160 x 2.5
= 400