PSLE Linda spent $540 in May. This amount was a 40% decrease from what she spent in April. The amount she spent in June was a 30% increase 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 |
- 40% |
|
May |
60% |
100 u |
Change |
|
+ 30 u |
June |
|
130 u |
(a)
Spending in April = 100%
Spending in May = 100% - 40% = 60%
60% = 540
1% = 540 ÷ 60 = 9
Spending in April
= 100%
= 100 x 9
= $900
Spending in May = 100 u
Spending in June = 100 u + 30 u = 130 u
100 u = 540
1 u = 540 ÷ 100 = 5.4
Spending in June
= 130 u
= 130 x 5.4
= $702
Total spending from April to June
= 900 + 540 + 702
= $2142
(b)
Decrease in spending in June compared to April
= 900 - 702
= $198
Percentage decrease
=
Decrease in spendingSpending in April x 100%
=
198900 x 100%
= 22%
Answer(s): (a) $2142; (b) 22%