PSLE Linda saved $480 in July. This amount was a 20% increase from what she saved in June. The amount she saved in August was a 50% decrease from what she saved in July.
- What was the total amount that Linda saved from June to August?
- What was the percentage decrease in the amount Linda saved in August compared to June?
|
Savings |
June |
100% |
|
Change |
+ 20% |
|
July |
120% |
100 u |
Change |
|
- 50 u |
August |
|
50 u |
(a)
Savings in June = 100%
Savings in July = 100% + 20% = 120%
120% = 480
1% = 480 ÷ 120 = 4
Savings in June
= 100%
= 100 x 4
= $400
Savings in July = 100 u
Savings in August = 100 u - 50 u = 50 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Savings in August
= 50 u
= 50 x 4.8
= $240
Total savings from June to August
= 400 + 480 + 240
= $1120
(b)
Decrease in savings in August compared to June
= 400 - 240
= $160
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
160400 x 100%
= 40%
Answer(s): (a) $1120; (b) 40%