PSLE Linda spent $760 in April. This amount was a 5% 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 increase in the amount Linda spent in May compared to March?
|
Spending |
March |
100% |
|
Change |
- 5% |
|
April |
95% |
100 u |
Change |
|
+ 20 u |
May |
|
120 u |
(a)
Spending in March = 100%
Spending in April = 100% - 5% = 95%
95% = 760
1% = 760 ÷ 95 = 8
Spending in March
= 100%
= 100 x 8
= $800
Spending in April = 100 u
Spending in May = 100 u + 20 u = 120 u
100 u = 760
1 u = 760 ÷ 100 = 7.6
Spending in May
= 120 u
= 120 x 7.6
= $912
Total spending from March to May
= 800 + 760 + 912
= $2472
(b)
Increase in spending in May compared to March
= 912 - 800
= $112
Percentage increase
=
Increase in spendingSpending in March x 100%
=
112800 x 100%
= 14%
Answer(s): (a) $2472; (b) 14%