PSLE Linda saved $650 in March. This amount was a 30% increase from what she saved in February. The amount she saved in April was a 30% 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 |
+ 30% |
|
March |
130% |
100 u |
Change |
|
- 30 u |
April |
|
70 u |
(a)
Savings in February = 100%
Savings in March = 100% + 30% = 130%
130% = 650
1% = 650 ÷ 130 = 5
Savings in February
= 100%
= 100 x 5
= $500
Savings in March = 100 u
Savings in April = 100 u - 30 u = 70 u
100 u = 650
1 u = 650 ÷ 100 = 6.5
Savings in April
= 70 u
= 70 x 6.5
= $455
Total savings from February to April
= 500 + 650 + 455
= $1605
(b)
Decrease in savings in April compared to February
= 500 - 455
= $45
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
45500 x 100%
= 9%
Answer(s): (a) $1605; (b) 9%