PSLE Linda spent $560 in June. This amount was a 40% increase from what she spent in May. The amount she spent in July was a 45% decrease from what she spent in June.
- What was the total amount that Linda spent from May to July?
- What was the percentage decrease in the amount Linda spent in July compared to May?
|
Spending |
May |
100% |
|
Change |
+ 40% |
|
June |
140% |
100 u |
Change |
|
- 45 u |
July |
|
55 u |
(a)
Spending in May = 100%
Spending in June = 100% + 40% = 140%
140% = 560
1% = 560 ÷ 140 = 4
Spending in May
= 100%
= 100 x 4
= $400
Spending in June = 100 u
Spending in July = 100 u - 45 u = 55 u
100 u = 560
1 u = 560 ÷ 100 = 5.6
Spending in July
= 55 u
= 55 x 5.6
= $308
Total spending from May to July
= 400 + 560 + 308
= $1268
(b)
Decrease in spending in July compared to May
= 400 - 308
= $92
Percentage decrease
=
Decrease in spendingSpending in May x 100%
=
92400 x 100%
= 23%
Answer(s): (a) $1268; (b) 23%