PSLE Ivan was given a fixed amount of allowance each month. In June, he spent $220 and saved the rest. In July, he spent 30% more and his savings decreased by 20%. How much was Ivan's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 30% |
- 20 u |
After |
130% |
80 u |
100% of spending = 220
1% of spending = 220 ÷ 100 = 2.2
30% of spending = 30% x 220 = 66
30% of spending = 20 u of savings
20 u of savings = 66
1 u of savings = 66 ÷ 20 = 3.3
100 u of savings = 100 x 3.3 = 330
Ivan's allowance for each month
= 100% of spending + 100 u of savings
= 220 + 330
= $550
Answer(s): $550