PSLE Linda saved $500 in July. This amount was a 50% 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 decrease in the amount Linda saved in August compared to June?
|
Savings |
June |
100% |
|
Change |
- 50% |
|
July |
50% |
100 u |
Change |
|
+ 50 u |
August |
|
150 u |
(a)
Savings in June = 100%
Savings in July = 100% - 50% = 50%
50% = 500
1% = 500 ÷ 50 = 10
Savings in June
= 100%
= 100 x 10
= $1000
Savings in July = 100 u
Savings in August = 100 u + 50 u = 150 u
100 u = 500
1 u = 500 ÷ 100 = 5
Savings in August
= 150 u
= 150 x 5
= $750
Total savings from June to August
= 1000 + 500 + 750
= $2250
(b)
Decrease in savings in August compared to June
= 1000 - 750
= $250
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
2501000 x 100%
= 25%
Answer(s): (a) $2250; (b) 25%