PSLE Linda spent $130 in April. This amount was a 35% decrease from what she spent in March. The amount she spent in May was a 40% increase 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 |
65% |
100 u |
Change |
|
+ 40 u |
May |
|
140 u |
(a)
Spending in March = 100%
Spending in April = 100% - 35% = 65%
65% = 130
1% = 130 ÷ 65 = 2
Spending in March
= 100%
= 100 x 2
= $200
Spending in April = 100 u
Spending in May = 100 u + 40 u = 140 u
100 u = 130
1 u = 130 ÷ 100 = 1.3
Spending in May
= 140 u
= 140 x 1.3
= $182
Total spending from March to May
= 200 + 130 + 182
= $512
(b)
Decrease in spending in May compared to March
= 200 - 182
= $18
Percentage decrease
=
Decrease in spendingSpending in March x 100%
=
18200 x 100%
= 9%
Answer(s): (a) $512; (b) 9%