PSLE Linda spent $260 in April. This amount was a 35% decrease from what she spent in March. The amount she spent in May was a 20% 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 |
- 35% |
|
April |
65% |
100 u |
Change |
|
+ 20 u |
May |
|
120 u |
(a)
Spending in March = 100%
Spending in April = 100% - 35% = 65%
65% = 260
1% = 260 ÷ 65 = 4
Spending in March
= 100%
= 100 x 4
= $400
Spending in April = 100 u
Spending in May = 100 u + 20 u = 120 u
100 u = 260
1 u = 260 ÷ 100 = 2.6
Spending in May
= 120 u
= 120 x 2.6
= $312
Total spending from March to May
= 400 + 260 + 312
= $972
(b)
Decrease in spending in May compared to March
= 400 - 312
= $88
Percentage decrease
=
Decrease in spendingSpending in March x 100%
=
88400 x 100%
= 22%
Answer(s): (a) $972; (b) 22%