PSLE Elijah was given a fixed amount of allowance each month. In February, he spent $280 and saved the rest. In March, he spent 40% more and his savings decreased by 10%. How much was Elijah's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 10 u |
After |
140% |
90 u |
100% of spending = 280
1% of spending = 280 ÷ 100 = 2.8
40% of spending = 40% x 280 = 112
40% of spending = 10 u of savings
10 u of savings = 112
1 u of savings = 112 ÷ 10 = 11.2
100 u of savings = 100 x 11.2 = 1120
Elijah's allowance for each month
= 100% of spending + 100 u of savings
= 280 + 1120
= $1400
Answer(s): $1400