PSLE Linda spent $360 in April. This amount was a 40% decrease from what she spent in March. The amount she spent in May was a 50% 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 |
- 40% |
|
April |
60% |
100 u |
Change |
|
+ 50 u |
May |
|
150 u |
(a)
Spending in March = 100%
Spending in April = 100% - 40% = 60%
60% = 360
1% = 360 ÷ 60 = 6
Spending in March
= 100%
= 100 x 6
= $600
Spending in April = 100 u
Spending in May = 100 u + 50 u = 150 u
100 u = 360
1 u = 360 ÷ 100 = 3.6
Spending in May
= 150 u
= 150 x 3.6
= $540
Total spending from March to May
= 600 + 360 + 540
= $1500
(b)
Decrease in spending in May compared to March
= 600 - 540
= $60
Percentage decrease
=
Decrease in spendingSpending in March x 100%
=
60600 x 100%
= 10%
Answer(s): (a) $1500; (b) 10%