PSLE Zane was given a fixed amount of allowance each month. In May, he saved $110 and spent the rest. In June, he saved 30% more and his spending decreased by 10%. How much was Zane's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 30% |
- 10 u |
After |
130% |
90 u |
100% of savings = 110
1% of savings = 110 ÷ 100 = 1.1
30% of savings = 30% x 110 = 33
30% of savings = 10 u of spending
10 u of spending = 33
1 u of spending = 33 ÷ 10 = 3.3
100 u of spending = 100 x 3.3 = 330
Zane's allowance for each month
= 100% of savings + 100 u of spending
= 110 + 330
= $440
Answer(s): $440