PSLE Linda spent $435 in July. This amount was a 45% increase from what she spent in June. The amount she spent in August was a 20% decrease from what she spent in July.
- What was the total amount that Linda spent from June to August?
- What was the percentage increase in the amount Linda spent in August compared to June?
|
Spending |
June |
100% |
|
Change |
+ 45% |
|
July |
145% |
100 u |
Change |
|
- 20 u |
August |
|
80 u |
(a)
Spending in June = 100%
Spending in July = 100% + 45% = 145%
145% = 435
1% = 435 ÷ 145 = 3
Spending in June
= 100%
= 100 x 3
= $300
Spending in July = 100 u
Spending in August = 100 u - 20 u = 80 u
100 u = 435
1 u = 435 ÷ 100 = 4.35
Spending in August
= 80 u
= 80 x 4.35
= $348
Total spending from June to August
= 300 + 435 + 348
= $1083
(b)
Increase in spending in August compared to June
= 348 - 300
= $48
Percentage increase
=
Increase in spendingSpending in June x 100%
=
48300 x 100%
= 16%
Answer(s): (a) $1083; (b) 16%