PSLE Linda spent $1500 in July. This amount was a 50% 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 |
+ 50% |
|
July |
150% |
100 u |
Change |
|
- 20 u |
August |
|
80 u |
(a)
Spending in June = 100%
Spending in July = 100% + 50% = 150%
150% = 1500
1% = 1500 ÷ 150 = 10
Spending in June
= 100%
= 100 x 10
= $1000
Spending in July = 100 u
Spending in August = 100 u - 20 u = 80 u
100 u = 1500
1 u = 1500 ÷ 100 = 15
Spending in August
= 80 u
= 80 x 15
= $1200
Total spending from June to August
= 1000 + 1500 + 1200
= $3700
(b)
Increase in spending in August compared to June
= 1200 - 1000
= $200
Percentage increase
=
Increase in spendingSpending in June x 100%
=
2001000 x 100%
= 20%
Answer(s): (a) $3700; (b) 20%