PSLE Linda saved $140 in March. This amount was a 30% 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 |
- 30% |
|
March |
70% |
100 u |
Change |
|
+ 10 u |
April |
|
110 u |
(a)
Savings in February = 100%
Savings in March = 100% - 30% = 70%
70% = 140
1% = 140 ÷ 70 = 2
Savings in February
= 100%
= 100 x 2
= $200
Savings in March = 100 u
Savings in April = 100 u + 10 u = 110 u
100 u = 140
1 u = 140 ÷ 100 = 1.4
Savings in April
= 110 u
= 110 x 1.4
= $154
Total savings from February to April
= 200 + 140 + 154
= $494
(b)
Decrease in savings in April compared to February
= 200 - 154
= $46
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
46200 x 100%
= 23%
Answer(s): (a) $494; (b) 23%