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Question
primary 6 | Maths
| Percentage
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Help me solve it.Thanks!
Pears : 60% = 60/100 = 3/5
Apples : 100% - 60% = 40% = 40/100 = 2/5
Ratio of pears to apples at first = 3 : 2
After :
Pears : 30% = 30/100 = 3/10
Apples : 100% - 30% = 70% = 70/100 = 7/10
Ratio of pears to apples now = 3 : 7
Note that the number of apples didn't change as none were given away.
So we should make the number of units for apples the same.
3 : 2 = 21 : 14 (multiply by 7)
3 : 7 = 6 : 14 (multiply by 2)
This tells us there were 21 units of pears at first. And there are 6 units of pears now.
21 - 6 = 15
So 15 units of pears were given away.
15 units = 60
1 unit = 60 ÷ 15 = 4
Number of apples in the basket
= 14 units
= 14 x 4
= 56
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