PSLE Jeremy was given a fixed amount of allowance each month. In September, he spent $130 and saved the rest. In October, he spent 40% less and his savings increased by 10%. How much was Jeremy's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $130 |
100 u
|
Change |
- 40% |
+ 10 u |
After |
60% |
110 u |
100% of spending = 130
1% of spending = 130 ÷ 100 = 1.3
40% of spending = 40% x 130 = 52
40% of spending = 10 u of savings
10 u of savings = 52
1 u of savings = 52 ÷ 10 = 5.2
100 u of savings = 100 x 5.2 = 520
Jeremy's allowance for each month
= 100% of spending + 100 u of savings
= 130 + 520
= $650
Answer(s): $650