PSLE Ahmad was given a fixed amount of allowance each month. In May, he saved $380 and spent the rest. In June, he saved 10% more and his spending decreased by 20%. How much was Ahmad's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 10% |
- 20 u |
After |
110% |
80 u |
100% of savings = 380
1% of savings = 380 ÷ 100 = 3.8
10% of savings = 10% x 380 = 38
10% of savings = 20 u of spending
20 u of spending = 38
1 u of spending = 38 ÷ 20 = 1.9
100 u of spending = 100 x 1.9 = 190
Ahmad's allowance for each month
= 100% of savings + 100 u of spending
= 380 + 190
= $570
Answer(s): $570