PSLE Linda spent $360 in March. This amount was a 20% increase from what she spent in February. The amount she spent in April was a 45% decrease from what she spent in March.
- What was the total amount that Linda spent from February to April?
- What was the percentage decrease in the amount Linda spent in April compared to February?
|
Spending |
February |
100% |
|
Change |
+ 20% |
|
March |
120% |
100 u |
Change |
|
- 45 u |
April |
|
55 u |
(a)
Spending in February = 100%
Spending in March = 100% + 20% = 120%
120% = 360
1% = 360 ÷ 120 = 3
Spending in February
= 100%
= 100 x 3
= $300
Spending in March = 100 u
Spending in April = 100 u - 45 u = 55 u
100 u = 360
1 u = 360 ÷ 100 = 3.6
Spending in April
= 55 u
= 55 x 3.6
= $198
Total spending from February to April
= 300 + 360 + 198
= $858
(b)
Decrease in spending in April compared to February
= 300 - 198
= $102
Percentage decrease
=
Decrease in spendingSpending in February x 100%
=
102300 x 100%
= 34%
Answer(s): (a) $858; (b) 34%