PSLE Linda spent $1300 in April. This amount was a 30% increase from what she spent in March. The amount she spent in May was a 50% decrease 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 |
+ 30% |
|
April |
130% |
100 u |
Change |
|
- 50 u |
May |
|
50 u |
(a)
Spending in March = 100%
Spending in April = 100% + 30% = 130%
130% = 1300
1% = 1300 ÷ 130 = 10
Spending in March
= 100%
= 100 x 10
= $1000
Spending in April = 100 u
Spending in May = 100 u - 50 u = 50 u
100 u = 1300
1 u = 1300 ÷ 100 = 13
Spending in May
= 50 u
= 50 x 13
= $650
Total spending from March to May
= 1000 + 1300 + 650
= $2950
(b)
Decrease in spending in May compared to March
= 1000 - 650
= $350
Percentage decrease
=
Decrease in spendingSpending in March x 100%
=
3501000 x 100%
= 35%
Answer(s): (a) $2950; (b) 35%