PSLE Linda saved $1035 in July. This amount was a 15% 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 |
+ 15% |
|
July |
115% |
100 u |
Change |
|
- 40 u |
August |
|
60 u |
(a)
Savings in June = 100%
Savings in July = 100% + 15% = 115%
115% = 1035
1% = 1035 ÷ 115 = 9
Savings in June
= 100%
= 100 x 9
= $900
Savings in July = 100 u
Savings in August = 100 u - 40 u = 60 u
100 u = 1035
1 u = 1035 ÷ 100 = 10.35
Savings in August
= 60 u
= 60 x 10.35
= $621
Total savings from June to August
= 900 + 1035 + 621
= $2556
(b)
Decrease in savings in August compared to June
= 900 - 621
= $279
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
279900 x 100%
= 31%
Answer(s): (a) $2556; (b) 31%