PSLE Zeph was given a fixed amount of allowance each month. In October, he spent $460 and saved the rest. In November, he spent 40% more and his savings decreased by 20%. How much was Zeph's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 20 u |
After |
140% |
80 u |
100% of spending = 460
1% of spending = 460 ÷ 100 = 4.6
40% of spending = 40% x 460 = 184
40% of spending = 20 u of savings
20 u of savings = 184
1 u of savings = 184 ÷ 20 = 9.2
100 u of savings = 100 x 9.2 = 920
Zeph's allowance for each month
= 100% of spending + 100 u of savings
= 460 + 920
= $1380
Answer(s): $1380