PSLE Linda spent $480 in May. This amount was a 20% increase from what she spent in April. The amount she spent in June was a 15% decrease 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 |
+ 20% |
|
May |
120% |
100 u |
Change |
|
- 15 u |
June |
|
85 u |
(a)
Spending in April = 100%
Spending in May = 100% + 20% = 120%
120% = 480
1% = 480 ÷ 120 = 4
Spending in April
= 100%
= 100 x 4
= $400
Spending in May = 100 u
Spending in June = 100 u - 15 u = 85 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Spending in June
= 85 u
= 85 x 4.8
= $408
Total spending from April to June
= 400 + 480 + 408
= $1288
(b)
Increase in spending in June compared to April
= 408 - 400
= $8
Percentage increase
=
Increase in spendingSpending in April x 100%
=
8400 x 100%
= 2%
Answer(s): (a) $1288; (b) 2%