PSLE Linda saved $400 in March. This amount was a 20% decrease from what she saved in February. The amount she saved in April was a 40% increase from what she saved in March.
- What was the total amount that Linda saved from February to April?
- What was the percentage increase in the amount Linda saved in April compared to February?
|
Savings |
February |
100% |
|
Change |
- 20% |
|
March |
80% |
100 u |
Change |
|
+ 40 u |
April |
|
140 u |
(a)
Savings in February = 100%
Savings in March = 100% - 20% = 80%
80% = 400
1% = 400 ÷ 80 = 5
Savings in February
= 100%
= 100 x 5
= $500
Savings in March = 100 u
Savings in April = 100 u + 40 u = 140 u
100 u = 400
1 u = 400 ÷ 100 = 4
Savings in April
= 140 u
= 140 x 4
= $560
Total savings from February to April
= 500 + 400 + 560
= $1460
(b)
Increase in savings in April compared to February
= 560 - 500
= $60
Percentage increase
=
Increase in savingsSavings in February x 100%
=
60500 x 100%
= 12%
Answer(s): (a) $1460; (b) 12%