PSLE Linda saved $1080 in July. This amount was a 20% increase from what she saved in June. The amount she saved in August was a 30% 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 |
+ 20% |
|
July |
120% |
100 u |
Change |
|
- 30 u |
August |
|
70 u |
(a)
Savings in June = 100%
Savings in July = 100% + 20% = 120%
120% = 1080
1% = 1080 ÷ 120 = 9
Savings in June
= 100%
= 100 x 9
= $900
Savings in July = 100 u
Savings in August = 100 u - 30 u = 70 u
100 u = 1080
1 u = 1080 ÷ 100 = 10.8
Savings in August
= 70 u
= 70 x 10.8
= $756
Total savings from June to August
= 900 + 1080 + 756
= $2736
(b)
Decrease in savings in August compared to June
= 900 - 756
= $144
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
144900 x 100%
= 16%
Answer(s): (a) $2736; (b) 16%