PSLE Linda saved $350 in March. This amount was a 50% decrease from what she saved in February. The amount she saved in April was a 50% 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 |
- 50% |
|
March |
50% |
100 u |
Change |
|
+ 50 u |
April |
|
150 u |
(a)
Savings in February = 100%
Savings in March = 100% - 50% = 50%
50% = 350
1% = 350 ÷ 50 = 7
Savings in February
= 100%
= 100 x 7
= $700
Savings in March = 100 u
Savings in April = 100 u + 50 u = 150 u
100 u = 350
1 u = 350 ÷ 100 = 3.5
Savings in April
= 150 u
= 150 x 3.5
= $525
Total savings from February to April
= 700 + 350 + 525
= $1575
(b)
Decrease in savings in April compared to February
= 700 - 525
= $175
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
175700 x 100%
= 25%
Answer(s): (a) $1575; (b) 25%