PSLE Linda saved $240 in March. This amount was a 40% decrease from what she saved in February. The amount she saved in April was a 10% increase 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 |
- 40% |
|
March |
60% |
100 u |
Change |
|
+ 10 u |
April |
|
110 u |
(a)
Savings in February = 100%
Savings in March = 100% - 40% = 60%
60% = 240
1% = 240 ÷ 60 = 4
Savings in February
= 100%
= 100 x 4
= $400
Savings in March = 100 u
Savings in April = 100 u + 10 u = 110 u
100 u = 240
1 u = 240 ÷ 100 = 2.4
Savings in April
= 110 u
= 110 x 2.4
= $264
Total savings from February to April
= 400 + 240 + 264
= $904
(b)
Decrease in savings in April compared to February
= 400 - 264
= $136
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
136400 x 100%
= 34%
Answer(s): (a) $904; (b) 34%