PSLE Linda spent $1080 in April. This amount was a 35% increase from what she spent in March. The amount she spent in May was a 40% decrease from what she spent in April.
- What was the total amount that Linda spent from March to May?
- What was the percentage decrease in the amount Linda spent in May compared to March?
|
Spending |
March |
100% |
|
Change |
+ 35% |
|
April |
135% |
100 u |
Change |
|
- 40 u |
May |
|
60 u |
(a)
Spending in March = 100%
Spending in April = 100% + 35% = 135%
135% = 1080
1% = 1080 ÷ 135 = 8
Spending in March
= 100%
= 100 x 8
= $800
Spending in April = 100 u
Spending in May = 100 u - 40 u = 60 u
100 u = 1080
1 u = 1080 ÷ 100 = 10.8
Spending in May
= 60 u
= 60 x 10.8
= $648
Total spending from March to May
= 800 + 1080 + 648
= $2528
(b)
Decrease in spending in May compared to March
= 800 - 648
= $152
Percentage decrease
=
Decrease in spendingSpending in March x 100%
=
152800 x 100%
= 19%
Answer(s): (a) $2528; (b) 19%