PSLE Valen was given a fixed amount of allowance each month. In October, he saved $430 and spent the rest. In November, he saved 20% more and his spending decreased by 40%. How much was Valen's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 20% |
- 40 u |
After |
120% |
60 u |
100% of savings = 430
1% of savings = 430 ÷ 100 = 4.3
20% of savings = 20% x 430 = 86
20% of savings = 40 u of spending
40 u of spending = 86
1 u of spending = 86 ÷ 40 = 2.15
100 u of spending = 100 x 2.15 = 215
Valen's allowance for each month
= 100% of savings + 100 u of spending
= 430 + 215
= $645
Answer(s): $645