PSLE Linda saved $600 in July. This amount was a 20% increase from what she saved in June. The amount she saved in August was a 10% decrease 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 |
120% |
100 u |
Change |
|
- 10 u |
August |
|
90 u |
(a)
Savings in June = 100%
Savings in July = 100% + 20% = 120%
120% = 600
1% = 600 ÷ 120 = 5
Savings in June
= 100%
= 100 x 5
= $500
Savings in July = 100 u
Savings in August = 100 u - 10 u = 90 u
100 u = 600
1 u = 600 ÷ 100 = 6
Savings in August
= 90 u
= 90 x 6
= $540
Total savings from June to August
= 500 + 600 + 540
= $1640
(b)
Increase in savings in August compared to June
= 540 - 500
= $40
Percentage increase
=
Increase in savingsSavings in June x 100%
=
40500 x 100%
= 8%
Answer(s): (a) $1640; (b) 8%