PSLE Linda saved $480 in July. This amount was a 40% decrease from what she saved in June. The amount she saved in August was a 40% increase 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 |
- 40% |
|
July |
60% |
100 u |
Change |
|
+ 40 u |
August |
|
140 u |
(a)
Savings in June = 100%
Savings in July = 100% - 40% = 60%
60% = 480
1% = 480 ÷ 60 = 8
Savings in June
= 100%
= 100 x 8
= $800
Savings in July = 100 u
Savings in August = 100 u + 40 u = 140 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Savings in August
= 140 u
= 140 x 4.8
= $672
Total savings from June to August
= 800 + 480 + 672
= $1952
(b)
Decrease in savings in August compared to June
= 800 - 672
= $128
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
128800 x 100%
= 16%
Answer(s): (a) $1952; (b) 16%