PSLE Linda saved $220 in March. This amount was a 10% increase from what she saved in February. The amount she saved in April was a 40% decrease from what she saved in March.
- What was the total amount that Linda saved from February to April?
- What was the percentage decrease in the amount Linda saved in April compared to February?
|
Savings |
February |
100% |
|
Change |
+ 10% |
|
March |
110% |
100 u |
Change |
|
- 40 u |
April |
|
60 u |
(a)
Savings in February = 100%
Savings in March = 100% + 10% = 110%
110% = 220
1% = 220 ÷ 110 = 2
Savings in February
= 100%
= 100 x 2
= $200
Savings in March = 100 u
Savings in April = 100 u - 40 u = 60 u
100 u = 220
1 u = 220 ÷ 100 = 2.2
Savings in April
= 60 u
= 60 x 2.2
= $132
Total savings from February to April
= 200 + 220 + 132
= $552
(b)
Decrease in savings in April compared to February
= 200 - 132
= $68
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
68200 x 100%
= 34%
Answer(s): (a) $552; (b) 34%