PSLE Linda saved $720 in March. This amount was a 20% increase from what she saved in February. The amount she saved in April was a 45% 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 |
+ 20% |
|
March |
120% |
100 u |
Change |
|
- 45 u |
April |
|
55 u |
(a)
Savings in February = 100%
Savings in March = 100% + 20% = 120%
120% = 720
1% = 720 ÷ 120 = 6
Savings in February
= 100%
= 100 x 6
= $600
Savings in March = 100 u
Savings in April = 100 u - 45 u = 55 u
100 u = 720
1 u = 720 ÷ 100 = 7.2
Savings in April
= 55 u
= 55 x 7.2
= $396
Total savings from February to April
= 600 + 720 + 396
= $1716
(b)
Decrease in savings in April compared to February
= 600 - 396
= $204
Percentage decrease
=
Decrease in savingsSavings in February x 100%
=
204600 x 100%
= 34%
Answer(s): (a) $1716; (b) 34%