PSLE Ahmad was given a fixed amount of allowance each month. In July, he spent $140 and saved the rest. In August, he spent 30% more and his savings decreased by 10%. How much was Ahmad's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 30% |
- 10 u |
After |
130% |
90 u |
100% of spending = 140
1% of spending = 140 ÷ 100 = 1.4
30% of spending = 30% x 140 = 42
30% of spending = 10 u of savings
10 u of savings = 42
1 u of savings = 42 ÷ 10 = 4.2
100 u of savings = 100 x 4.2 = 420
Ahmad's allowance for each month
= 100% of spending + 100 u of savings
= 140 + 420
= $560
Answer(s): $560