PSLE Linda spent $600 in April. This amount was a 50% increase from what she spent in March. The amount she spent in May was a 10% decrease from what she spent in April.
- What was the total amount that Linda spent from March to May?
- What was the percentage increase in the amount Linda spent in May compared to March?
|
Spending |
March |
100% |
|
Change |
+ 50% |
|
April |
150% |
100 u |
Change |
|
- 10 u |
May |
|
90 u |
(a)
Spending in March = 100%
Spending in April = 100% + 50% = 150%
150% = 600
1% = 600 ÷ 150 = 4
Spending in March
= 100%
= 100 x 4
= $400
Spending in April = 100 u
Spending in May = 100 u - 10 u = 90 u
100 u = 600
1 u = 600 ÷ 100 = 6
Spending in May
= 90 u
= 90 x 6
= $540
Total spending from March to May
= 400 + 600 + 540
= $1540
(b)
Increase in spending in May compared to March
= 540 - 400
= $140
Percentage increase
=
Increase in spendingSpending in March x 100%
=
140400 x 100%
= 35%
Answer(s): (a) $1540; (b) 35%