PSLE Linda spent $280 in June. This amount was a 40% increase from what she spent in May. The amount she spent in July was a 10% decrease from what she spent in June.
- What was the total amount that Linda spent from May to July?
- What was the percentage increase in the amount Linda spent in July compared to May?
|
Spending |
May |
100% |
|
Change |
+ 40% |
|
June |
140% |
100 u |
Change |
|
- 10 u |
July |
|
90 u |
(a)
Spending in May = 100%
Spending in June = 100% + 40% = 140%
140% = 280
1% = 280 ÷ 140 = 2
Spending in May
= 100%
= 100 x 2
= $200
Spending in June = 100 u
Spending in July = 100 u - 10 u = 90 u
100 u = 280
1 u = 280 ÷ 100 = 2.8
Spending in July
= 90 u
= 90 x 2.8
= $252
Total spending from May to July
= 200 + 280 + 252
= $732
(b)
Increase in spending in July compared to May
= 252 - 200
= $52
Percentage increase
=
Increase in spendingSpending in May x 100%
=
52200 x 100%
= 26%
Answer(s): (a) $732; (b) 26%