PSLE Linda spent $560 in March. This amount was a 20% decrease from what she spent in February. The amount she spent in April was a 30% increase from what she spent in March.
- What was the total amount that Linda spent from February to April?
- What was the percentage increase in the amount Linda spent in April compared to February?
|
Spending |
February |
100% |
|
Change |
- 20% |
|
March |
80% |
100 u |
Change |
|
+ 30 u |
April |
|
130 u |
(a)
Spending in February = 100%
Spending in March = 100% - 20% = 80%
80% = 560
1% = 560 ÷ 80 = 7
Spending in February
= 100%
= 100 x 7
= $700
Spending in March = 100 u
Spending in April = 100 u + 30 u = 130 u
100 u = 560
1 u = 560 ÷ 100 = 5.6
Spending in April
= 130 u
= 130 x 5.6
= $728
Total spending from February to April
= 700 + 560 + 728
= $1988
(b)
Increase in spending in April compared to February
= 728 - 700
= $28
Percentage increase
=
Increase in spendingSpending in February x 100%
=
28700 x 100%
= 4%
Answer(s): (a) $1988; (b) 4%