PSLE Linda saved $810 in July. This amount was a 10% decrease from what she saved in June. The amount she saved in August was a 50% 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 |
- 10% |
|
July |
90% |
100 u |
Change |
|
+ 50 u |
August |
|
150 u |
(a)
Savings in June = 100%
Savings in July = 100% - 10% = 90%
90% = 810
1% = 810 ÷ 90 = 9
Savings in June
= 100%
= 100 x 9
= $900
Savings in July = 100 u
Savings in August = 100 u + 50 u = 150 u
100 u = 810
1 u = 810 ÷ 100 = 8.1
Savings in August
= 150 u
= 150 x 8.1
= $1215
Total savings from June to August
= 900 + 810 + 1215
= $2925
(b)
Increase in savings in August compared to June
= 1215 - 900
= $315
Percentage increase
=
Increase in savingsSavings in June x 100%
=
315900 x 100%
= 35%
Answer(s): (a) $2925; (b) 35%