PSLE Linda saved $280 in March. This amount was a 40% increase from what she saved in February. The amount she saved in April was a 50% 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 |
+ 40% |
|
March |
140% |
100 u |
Change |
|
- 50 u |
April |
|
50 u |
(a)
Savings in February = 100%
Savings in March = 100% + 40% = 140%
140% = 280
1% = 280 ÷ 140 = 2
Savings in February
= 100%
= 100 x 2
= $200
Savings in March = 100 u
Savings in April = 100 u - 50 u = 50 u
100 u = 280
1 u = 280 ÷ 100 = 2.8
Savings in April
= 50 u
= 50 x 2.8
= $140
Total savings from February to April
= 200 + 280 + 140
= $620
(b)
Decrease in savings in April compared to February
= 200 - 140
= $60
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
60200 x 100%
= 30%
Answer(s): (a) $620; (b) 30%