PSLE Liam was given a fixed amount of allowance each month. In July, he spent $280 and saved the rest. In August, he spent 40% more and his savings decreased by 20%. How much was Liam's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 20 u |
After |
140% |
80 u |
100% of spending = 280
1% of spending = 280 ÷ 100 = 2.8
40% of spending = 40% x 280 = 112
40% of spending = 20 u of savings
20 u of savings = 112
1 u of savings = 112 ÷ 20 = 5.6
100 u of savings = 100 x 5.6 = 560
Liam's allowance for each month
= 100% of spending + 100 u of savings
= 280 + 560
= $840
Answer(s): $840