PSLE Linda spent $350 in March. This amount was a 50% decrease from what she spent in February. The amount she spent in April was a 30% increase from what she spent in March.
- What was the total amount that Linda spent from February to April?
- What was the percentage decrease in the amount Linda spent in April compared to February?
|
Spending |
February |
100% |
|
Change |
- 50% |
|
March |
50% |
100 u |
Change |
|
+ 30 u |
April |
|
130 u |
(a)
Spending in February = 100%
Spending in March = 100% - 50% = 50%
50% = 350
1% = 350 ÷ 50 = 7
Spending in February
= 100%
= 100 x 7
= $700
Spending in March = 100 u
Spending in April = 100 u + 30 u = 130 u
100 u = 350
1 u = 350 ÷ 100 = 3.5
Spending in April
= 130 u
= 130 x 3.5
= $455
Total spending from February to April
= 700 + 350 + 455
= $1505
(b)
Decrease in spending in April compared to February
= 700 - 455
= $245
Percentage decrease
=
Decrease in spendingSpending in February x 100%
=
245700 x 100%
= 35%
Answer(s): (a) $1505; (b) 35%