PSLE Paul was given a fixed amount of allowance each month. In November, he saved $480 and spent the rest. In December, he saved 30% more and his spending decreased by 40%. How much was Paul's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 30% |
- 40 u |
After |
130% |
60 u |
100% of savings = 480
1% of savings = 480 ÷ 100 = 4.8
30% of savings = 30% x 480 = 144
30% of savings = 40 u of spending
40 u of spending = 144
1 u of spending = 144 ÷ 40 = 3.6
100 u of spending = 100 x 3.6 = 360
Paul's allowance for each month
= 100% of savings + 100 u of spending
= 480 + 360
= $840
Answer(s): $840