PSLE Linda spent $750 in April. This amount was a 50% increase from what she spent in March. The amount she spent in May was a 30% 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 |
|
- 30 u |
May |
|
70 u |
(a)
Spending in March = 100%
Spending in April = 100% + 50% = 150%
150% = 750
1% = 750 ÷ 150 = 5
Spending in March
= 100%
= 100 x 5
= $500
Spending in April = 100 u
Spending in May = 100 u - 30 u = 70 u
100 u = 750
1 u = 750 ÷ 100 = 7.5
Spending in May
= 70 u
= 70 x 7.5
= $525
Total spending from March to May
= 500 + 750 + 525
= $1775
(b)
Increase in spending in May compared to March
= 525 - 500
= $25
Percentage increase
=
Increase in spendingSpending in March x 100%
=
25500 x 100%
= 5%
Answer(s): (a) $1775; (b) 5%