PSLE Linda spent $240 in July. This amount was a 20% decrease from what she spent in June. The amount she spent in August was a 30% increase 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 |
- 20% |
|
July |
80% |
100 u |
Change |
|
+ 30 u |
August |
|
130 u |
(a)
Spending in June = 100%
Spending in July = 100% - 20% = 80%
80% = 240
1% = 240 ÷ 80 = 3
Spending in June
= 100%
= 100 x 3
= $300
Spending in July = 100 u
Spending in August = 100 u + 30 u = 130 u
100 u = 240
1 u = 240 ÷ 100 = 2.4
Spending in August
= 130 u
= 130 x 2.4
= $312
Total spending from June to August
= 300 + 240 + 312
= $852
(b)
Increase in spending in August compared to June
= 312 - 300
= $12
Percentage increase
=
Increase in spendingSpending in June x 100%
=
12300 x 100%
= 4%
Answer(s): (a) $852; (b) 4%