PSLE Tim was given a fixed amount of allowance each month. In February, he saved $390 and spent the rest. In March, he saved 40% more and his spending decreased by 30%. How much was Tim's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 30 u |
After |
140% |
70 u |
100% of savings = 390
1% of savings = 390 ÷ 100 = 3.9
40% of savings = 40% x 390 = 156
40% of savings = 30 u of spending
30 u of spending = 156
1 u of spending = 156 ÷ 30 = 5.2
100 u of spending = 100 x 5.2 = 520
Tim's allowance for each month
= 100% of savings + 100 u of spending
= 390 + 520
= $910
Answer(s): $910