PSLE Linda spent $290 in April. This amount was a 45% increase from what she spent in March. The amount she spent in May was a 20% 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 |
+ 45% |
|
April |
145% |
100 u |
Change |
|
- 20 u |
May |
|
80 u |
(a)
Spending in March = 100%
Spending in April = 100% + 45% = 145%
145% = 290
1% = 290 ÷ 145 = 2
Spending in March
= 100%
= 100 x 2
= $200
Spending in April = 100 u
Spending in May = 100 u - 20 u = 80 u
100 u = 290
1 u = 290 ÷ 100 = 2.9
Spending in May
= 80 u
= 80 x 2.9
= $232
Total spending from March to May
= 200 + 290 + 232
= $722
(b)
Increase in spending in May compared to March
= 232 - 200
= $32
Percentage increase
=
Increase in spendingSpending in March x 100%
=
32200 x 100%
= 16%
Answer(s): (a) $722; (b) 16%