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 40% decrease from what she spent in May.
- What was the total amount that Linda spent from April to June?
- What was the percentage decrease in the amount Linda spent in June compared to April?
|
Spending |
April |
100% |
|
Change |
+ 20% |
|
May |
120% |
100 u |
Change |
|
- 40 u |
June |
|
60 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 - 40 u = 60 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Spending in June
= 60 u
= 60 x 4.8
= $288
Total spending from April to June
= 400 + 480 + 288
= $1168
(b)
Decrease in spending in June compared to April
= 400 - 288
= $112
Percentage decrease
=
Decrease in spendingSpending in April x 100%
=
112400 x 100%
= 28%
Answer(s): (a) $1168; (b) 28%