PSLE Linda saved $315 in July. This amount was a 5% increase from what she saved in June. The amount she saved in August was a 40% 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 |
+ 5% |
|
July |
105% |
100 u |
Change |
|
- 40 u |
August |
|
60 u |
(a)
Savings in June = 100%
Savings in July = 100% + 5% = 105%
105% = 315
1% = 315 ÷ 105 = 3
Savings in June
= 100%
= 100 x 3
= $300
Savings in July = 100 u
Savings in August = 100 u - 40 u = 60 u
100 u = 315
1 u = 315 ÷ 100 = 3.15
Savings in August
= 60 u
= 60 x 3.15
= $189
Total savings from June to August
= 300 + 315 + 189
= $804
(b)
Decrease in savings in August compared to June
= 300 - 189
= $111
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
111300 x 100%
= 37%
Answer(s): (a) $804; (b) 37%