PSLE Luke was given a fixed amount of allowance each month. In January, he spent $220 and saved the rest. In February, he spent 20% more and his savings decreased by 10%. How much was Luke's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 20% |
- 10 u |
After |
120% |
90 u |
100% of spending = 220
1% of spending = 220 ÷ 100 = 2.2
20% of spending = 20% x 220 = 44
20% of spending = 10 u of savings
10 u of savings = 44
1 u of savings = 44 ÷ 10 = 4.4
100 u of savings = 100 x 4.4 = 440
Luke's allowance for each month
= 100% of spending + 100 u of savings
= 220 + 440
= $660
Answer(s): $660