PSLE Linda spent $660 in March. This amount was a 10% 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 decrease in the amount Linda spent in April compared to February?
|
Spending |
February |
100% |
|
Change |
+ 10% |
|
March |
110% |
100 u |
Change |
|
- 20 u |
April |
|
80 u |
(a)
Spending in February = 100%
Spending in March = 100% + 10% = 110%
110% = 660
1% = 660 ÷ 110 = 6
Spending in February
= 100%
= 100 x 6
= $600
Spending in March = 100 u
Spending in April = 100 u - 20 u = 80 u
100 u = 660
1 u = 660 ÷ 100 = 6.6
Spending in April
= 80 u
= 80 x 6.6
= $528
Total spending from February to April
= 600 + 660 + 528
= $1788
(b)
Decrease in spending in April compared to February
= 600 - 528
= $72
Percentage decrease
=
Decrease in spendingSpending in February x 100%
=
72600 x 100%
= 12%
Answer(s): (a) $1788; (b) 12%