PSLE Linda spent $725 in July. This amount was a 45% increase from what she spent in June. The amount she spent in August was a 40% decrease from what she spent in July.
- What was the total amount that Linda spent from June to August?
- What was the percentage decrease in the amount Linda spent in August compared to June?
|
Spending |
June |
100% |
|
Change |
+ 45% |
|
July |
145% |
100 u |
Change |
|
- 40 u |
August |
|
60 u |
(a)
Spending in June = 100%
Spending in July = 100% + 45% = 145%
145% = 725
1% = 725 ÷ 145 = 5
Spending in June
= 100%
= 100 x 5
= $500
Spending in July = 100 u
Spending in August = 100 u - 40 u = 60 u
100 u = 725
1 u = 725 ÷ 100 = 7.25
Spending in August
= 60 u
= 60 x 7.25
= $435
Total spending from June to August
= 500 + 725 + 435
= $1660
(b)
Decrease in spending in August compared to June
= 500 - 435
= $65
Percentage decrease
=
Decrease in spendingSpending in June x 100%
=
65500 x 100%
= 13%
Answer(s): (a) $1660; (b) 13%