PSLE George was given a fixed amount of allowance each month. In August, he saved $480 and spent the rest. In September, he saved 10% less and his spending increased by 30%. How much was George's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $480 |
100 u
|
Change |
- 10% |
+ 30 u |
After |
90% |
130 u |
100% of savings = 480
1% of savings = 480 ÷ 100 = 4.8
10% of savings = 10% x 480 = 48
10% of savings = 30 u of spending
30 u of spending = 48
1 u of spending = 48 ÷ 30 = 1.6
100 u of spending = 100 x 1.6 = 160
George's allowance for each month
= 100% of savings + 100 u of spending
= 480 + 160
= $640
Answer(s): $640