PSLE Linda saved $840 in March. This amount was a 5% 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 |
+ 5% |
|
March |
105% |
100 u |
Change |
|
- 40 u |
April |
|
60 u |
(a)
Savings in February = 100%
Savings in March = 100% + 5% = 105%
105% = 840
1% = 840 ÷ 105 = 8
Savings in February
= 100%
= 100 x 8
= $800
Savings in March = 100 u
Savings in April = 100 u - 40 u = 60 u
100 u = 840
1 u = 840 ÷ 100 = 8.4
Savings in April
= 60 u
= 60 x 8.4
= $504
Total savings from February to April
= 800 + 840 + 504
= $2144
(b)
Decrease in savings in April compared to February
= 800 - 504
= $296
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
296800 x 100%
= 37%
Answer(s): (a) $2144; (b) 37%