PSLE Linda spent $765 in May. This amount was a 15% decrease from what she spent in April. The amount she spent in June was a 40% increase from what she spent in May.
- What was the total amount that Linda spent from April to June?
- What was the percentage increase in the amount Linda spent in June compared to April?
|
Spending |
April |
100% |
|
Change |
- 15% |
|
May |
85% |
100 u |
Change |
|
+ 40 u |
June |
|
140 u |
(a)
Spending in April = 100%
Spending in May = 100% - 15% = 85%
85% = 765
1% = 765 ÷ 85 = 9
Spending in April
= 100%
= 100 x 9
= $900
Spending in May = 100 u
Spending in June = 100 u + 40 u = 140 u
100 u = 765
1 u = 765 ÷ 100 = 7.65
Spending in June
= 140 u
= 140 x 7.65
= $1071
Total spending from April to June
= 900 + 765 + 1071
= $2736
(b)
Increase in spending in June compared to April
= 1071 - 900
= $171
Percentage increase
=
Increase in spendingSpending in April x 100%
=
171900 x 100%
= 19%
Answer(s): (a) $2736; (b) 19%