PSLE Ahmad was given a fixed amount of allowance each month. In March, he saved $210 and spent the rest. In April, he saved 40% more and his spending decreased by 30%. How much was Ahmad's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 40% |
- 30 u |
After |
140% |
70 u |
100% of savings = 210
1% of savings = 210 ÷ 100 = 2.1
40% of savings = 40% x 210 = 84
40% of savings = 30 u of spending
30 u of spending = 84
1 u of spending = 84 ÷ 30 = 2.8
100 u of spending = 100 x 2.8 = 280
Ahmad's allowance for each month
= 100% of savings + 100 u of spending
= 210 + 280
= $490
Answer(s): $490