PSLE Linda spent $1080 in March. This amount was a 20% increase from what she spent in February. The amount she spent in April was a 15% 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 |
+ 20% |
|
March |
120% |
100 u |
Change |
|
- 15 u |
April |
|
85 u |
(a)
Spending in February = 100%
Spending in March = 100% + 20% = 120%
120% = 1080
1% = 1080 ÷ 120 = 9
Spending in February
= 100%
= 100 x 9
= $900
Spending in March = 100 u
Spending in April = 100 u - 15 u = 85 u
100 u = 1080
1 u = 1080 ÷ 100 = 10.8
Spending in April
= 85 u
= 85 x 10.8
= $918
Total spending from February to April
= 900 + 1080 + 918
= $2898
(b)
Increase in spending in April compared to February
= 918 - 900
= $18
Percentage increase
=
Increase in spendingSpending in February x 100%
=
18900 x 100%
= 2%
Answer(s): (a) $2898; (b) 2%