PSLE Peter was given a fixed amount of allowance each month. In August, he spent $290 and saved the rest. In September, he spent 40% less and his savings increased by 20%. How much was Peter's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $290 |
100 u
|
Change |
- 40% |
+ 20 u |
After |
60% |
120 u |
100% of spending = 290
1% of spending = 290 ÷ 100 = 2.9
40% of spending = 40% x 290 = 116
40% of spending = 20 u of savings
20 u of savings = 116
1 u of savings = 116 ÷ 20 = 5.8
100 u of savings = 100 x 5.8 = 580
Peter's allowance for each month
= 100% of spending + 100 u of savings
= 290 + 580
= $870
Answer(s): $870