PSLE Linda saved $280 in July. This amount was a 40% increase from what she saved in June. The amount she saved in August was a 45% 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 |
+ 40% |
|
July |
140% |
100 u |
Change |
|
- 45 u |
August |
|
55 u |
(a)
Savings in June = 100%
Savings in July = 100% + 40% = 140%
140% = 280
1% = 280 ÷ 140 = 2
Savings in June
= 100%
= 100 x 2
= $200
Savings in July = 100 u
Savings in August = 100 u - 45 u = 55 u
100 u = 280
1 u = 280 ÷ 100 = 2.8
Savings in August
= 55 u
= 55 x 2.8
= $154
Total savings from June to August
= 200 + 280 + 154
= $634
(b)
Decrease in savings in August compared to June
= 200 - 154
= $46
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
46200 x 100%
= 23%
Answer(s): (a) $634; (b) 23%