PSLE Luis was given a fixed amount of allowance each month. In July, he spent $250 and saved the rest. In August, he spent 30% more and his savings decreased by 10%. How much was Luis's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 30% |
- 10 u |
After |
130% |
90 u |
100% of spending = 250
1% of spending = 250 ÷ 100 = 2.5
30% of spending = 30% x 250 = 75
30% of spending = 10 u of savings
10 u of savings = 75
1 u of savings = 75 ÷ 10 = 7.5
100 u of savings = 100 x 7.5 = 750
Luis's allowance for each month
= 100% of spending + 100 u of savings
= 250 + 750
= $1000
Answer(s): $1000