PSLE Linda spent $480 in March. This amount was a 40% decrease from what she spent in February. The amount she spent in April was a 45% increase 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 |
- 40% |
|
March |
60% |
100 u |
Change |
|
+ 45 u |
April |
|
145 u |
(a)
Spending in February = 100%
Spending in March = 100% - 40% = 60%
60% = 480
1% = 480 ÷ 60 = 8
Spending in February
= 100%
= 100 x 8
= $800
Spending in March = 100 u
Spending in April = 100 u + 45 u = 145 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Spending in April
= 145 u
= 145 x 4.8
= $696
Total spending from February to April
= 800 + 480 + 696
= $1976
(b)
Decrease in spending in April compared to February
= 800 - 696
= $104
Percentage decrease
=
Decrease in spendingSpending in February x 100%
=
104800 x 100%
= 13%
Answer(s): (a) $1976; (b) 13%