PSLE Reggie was given a fixed amount of allowance each month. In October, he spent $490 and saved the rest. In November, he spent 20% more and his savings decreased by 10%. How much was Reggie's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 20% |
- 10 u |
After |
120% |
90 u |
100% of spending = 490
1% of spending = 490 ÷ 100 = 4.9
20% of spending = 20% x 490 = 98
20% of spending = 10 u of savings
10 u of savings = 98
1 u of savings = 98 ÷ 10 = 9.8
100 u of savings = 100 x 9.8 = 980
Reggie's allowance for each month
= 100% of spending + 100 u of savings
= 490 + 980
= $1470
Answer(s): $1470