PSLE Zeph was given a fixed amount of allowance each month. In July, he saved $330 and spent the rest. In August, he saved 20% less and his spending increased by 10%. How much was Zeph's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $330 |
100 u
|
Change |
- 20% |
+ 10 u |
After |
80% |
110 u |
100% of savings = 330
1% of savings = 330 ÷ 100 = 3.3
20% of savings = 20% x 330 = 66
20% of savings = 10 u of spending
10 u of spending = 66
1 u of spending = 66 ÷ 10 = 6.6
100 u of spending = 100 x 6.6 = 660
Zeph's allowance for each month
= 100% of savings + 100 u of spending
= 330 + 660
= $990
Answer(s): $990