PSLE Ahmad was given a fixed amount of allowance each month. In February, he spent $180 and saved the rest. In March, he spent 30% less and his savings increased by 20%. How much was Ahmad's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $180 |
100 u
|
Change |
- 30% |
+ 20 u |
After |
70% |
120 u |
100% of spending = 180
1% of spending = 180 ÷ 100 = 1.8
30% of spending = 30% x 180 = 54
30% of spending = 20 u of savings
20 u of savings = 54
1 u of savings = 54 ÷ 20 = 2.7
100 u of savings = 100 x 2.7 = 270
Ahmad's allowance for each month
= 100% of spending + 100 u of savings
= 180 + 270
= $450
Answer(s): $450