PSLE Neave was given a fixed amount of allowance each month. In January, he saved $270 and spent the rest. In February, he saved 10% more and his spending decreased by 20%. How much was Neave's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 10% |
- 20 u |
After |
110% |
80 u |
100% of savings = 270
1% of savings = 270 ÷ 100 = 2.7
10% of savings = 10% x 270 = 27
10% of savings = 20 u of spending
20 u of spending = 27
1 u of spending = 27 ÷ 20 = 1.35
100 u of spending = 100 x 1.35 = 135
Neave's allowance for each month
= 100% of savings + 100 u of spending
= 270 + 135
= $405
Answer(s): $405