PSLE Linda saved $320 in July. This amount was a 20% decrease from what she saved in June. The amount she saved in August was a 40% increase from what she saved in July.
- What was the total amount that Linda saved from June to August?
- What was the percentage increase in the amount Linda saved in August compared to June?
|
Savings |
June |
100% |
|
Change |
- 20% |
|
July |
80% |
100 u |
Change |
|
+ 40 u |
August |
|
140 u |
(a)
Savings in June = 100%
Savings in July = 100% - 20% = 80%
80% = 320
1% = 320 ÷ 80 = 4
Savings in June
= 100%
= 100 x 4
= $400
Savings in July = 100 u
Savings in August = 100 u + 40 u = 140 u
100 u = 320
1 u = 320 ÷ 100 = 3.2
Savings in August
= 140 u
= 140 x 3.2
= $448
Total savings from June to August
= 400 + 320 + 448
= $1168
(b)
Increase in savings in August compared to June
= 448 - 400
= $48
Percentage increase
=
Increase in savingsSavings in June x 100%
=
48400 x 100%
= 12%
Answer(s): (a) $1168; (b) 12%