PSLE Linda spent $380 in July. This amount was a 5% decrease from what she spent in June. The amount she spent in August was a 40% 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 |
- 5% |
|
July |
95% |
100 u |
Change |
|
+ 40 u |
August |
|
140 u |
(a)
Spending in June = 100%
Spending in July = 100% - 5% = 95%
95% = 380
1% = 380 ÷ 95 = 4
Spending in June
= 100%
= 100 x 4
= $400
Spending in July = 100 u
Spending in August = 100 u + 40 u = 140 u
100 u = 380
1 u = 380 ÷ 100 = 3.8
Spending in August
= 140 u
= 140 x 3.8
= $532
Total spending from June to August
= 400 + 380 + 532
= $1312
(b)
Increase in spending in August compared to June
= 532 - 400
= $132
Percentage increase
=
Increase in spendingSpending in June x 100%
=
132400 x 100%
= 33%
Answer(s): (a) $1312; (b) 33%