PSLE Linda spent $1350 in March. This amount was a 35% increase from what she spent in February. The amount she spent in April was a 20% decrease 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 |
+ 35% |
|
March |
135% |
100 u |
Change |
|
- 20 u |
April |
|
80 u |
(a)
Spending in February = 100%
Spending in March = 100% + 35% = 135%
135% = 1350
1% = 1350 ÷ 135 = 10
Spending in February
= 100%
= 100 x 10
= $1000
Spending in March = 100 u
Spending in April = 100 u - 20 u = 80 u
100 u = 1350
1 u = 1350 ÷ 100 = 13.5
Spending in April
= 80 u
= 80 x 13.5
= $1080
Total spending from February to April
= 1000 + 1350 + 1080
= $3430
(b)
Increase in spending in April compared to February
= 1080 - 1000
= $80
Percentage increase
=
Increase in spendingSpending in February x 100%
=
801000 x 100%
= 8%
Answer(s): (a) $3430; (b) 8%