PSLE Linda saved $420 in July. This amount was a 40% 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 |
+ 40% |
|
July |
140% |
100 u |
Change |
|
- 10 u |
August |
|
90 u |
(a)
Savings in June = 100%
Savings in July = 100% + 40% = 140%
140% = 420
1% = 420 ÷ 140 = 3
Savings in June
= 100%
= 100 x 3
= $300
Savings in July = 100 u
Savings in August = 100 u - 10 u = 90 u
100 u = 420
1 u = 420 ÷ 100 = 4.2
Savings in August
= 90 u
= 90 x 4.2
= $378
Total savings from June to August
= 300 + 420 + 378
= $1098
(b)
Increase in savings in August compared to June
= 378 - 300
= $78
Percentage increase
=
Increase in savingsSavings in June x 100%
=
78300 x 100%
= 26%
Answer(s): (a) $1098; (b) 26%