PSLE Ivan was given a fixed amount of allowance each month. In August, he spent $50 and saved the rest. In September, he spent 40% less and his savings increased by 10%. How much was Ivan's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $50 |
100 u
|
Change |
- 40% |
+ 10 u |
After |
60% |
110 u |
100% of spending = 50
1% of spending = 50 ÷ 100 = 0.5
40% of spending = 40% x 50 = 20
40% of spending = 10 u of savings
10 u of savings = 20
1 u of savings = 20 ÷ 10 = 2
100 u of savings = 100 x 2 = 200
Ivan's allowance for each month
= 100% of spending + 100 u of savings
= 50 + 200
= $250
Answer(s): $250