PSLE Zeph was given a fixed amount of allowance each month. In January, he saved $440 and spent the rest. In February, he saved 40% more and his spending decreased by 20%. How much was Zeph's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 20 u |
After |
140% |
80 u |
100% of savings = 440
1% of savings = 440 ÷ 100 = 4.4
40% of savings = 40% x 440 = 176
40% of savings = 20 u of spending
20 u of spending = 176
1 u of spending = 176 ÷ 20 = 8.8
100 u of spending = 100 x 8.8 = 880
Zeph's allowance for each month
= 100% of savings + 100 u of spending
= 440 + 880
= $1320
Answer(s): $1320