PSLE Linda spent $475 in March. This amount was a 5% decrease from what she spent in February. The amount she spent in April was a 20% 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 |
- 5% |
|
March |
95% |
100 u |
Change |
|
+ 20 u |
April |
|
120 u |
(a)
Spending in February = 100%
Spending in March = 100% - 5% = 95%
95% = 475
1% = 475 ÷ 95 = 5
Spending in February
= 100%
= 100 x 5
= $500
Spending in March = 100 u
Spending in April = 100 u + 20 u = 120 u
100 u = 475
1 u = 475 ÷ 100 = 4.75
Spending in April
= 120 u
= 120 x 4.75
= $570
Total spending from February to April
= 500 + 475 + 570
= $1545
(b)
Increase in spending in April compared to February
= 570 - 500
= $70
Percentage increase
=
Increase in spendingSpending in February x 100%
=
70500 x 100%
= 14%
Answer(s): (a) $1545; (b) 14%