PSLE Linda spent $675 in June. This amount was a 35% increase from what she spent in May. The amount she spent in July was a 40% 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 |
+ 35% |
|
June |
135% |
100 u |
Change |
|
- 40 u |
July |
|
60 u |
(a)
Spending in May = 100%
Spending in June = 100% + 35% = 135%
135% = 675
1% = 675 ÷ 135 = 5
Spending in May
= 100%
= 100 x 5
= $500
Spending in June = 100 u
Spending in July = 100 u - 40 u = 60 u
100 u = 675
1 u = 675 ÷ 100 = 6.75
Spending in July
= 60 u
= 60 x 6.75
= $405
Total spending from May to July
= 500 + 675 + 405
= $1580
(b)
Decrease in spending in July compared to May
= 500 - 405
= $95
Percentage decrease
=
Decrease in spendingSpending in May x 100%
=
95500 x 100%
= 19%
Answer(s): (a) $1580; (b) 19%