PSLE Linda saved $300 in July. This amount was a 50% increase from what she saved in June. The amount she saved in August was a 50% 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 |
+ 50% |
|
July |
150% |
100 u |
Change |
|
- 50 u |
August |
|
50 u |
(a)
Savings in June = 100%
Savings in July = 100% + 50% = 150%
150% = 300
1% = 300 ÷ 150 = 2
Savings in June
= 100%
= 100 x 2
= $200
Savings in July = 100 u
Savings in August = 100 u - 50 u = 50 u
100 u = 300
1 u = 300 ÷ 100 = 3
Savings in August
= 50 u
= 50 x 3
= $150
Total savings from June to August
= 200 + 300 + 150
= $650
(b)
Decrease in savings in August compared to June
= 200 - 150
= $50
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
50200 x 100%
= 25%
Answer(s): (a) $650; (b) 25%