PSLE Simon was given a fixed amount of allowance each month. In August, he saved $360 and spent the rest. In September, he saved 30% less and his spending increased by 20%. How much was Simon's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $360 |
100 u
|
Change |
- 30% |
+ 20 u |
After |
70% |
120 u |
100% of savings = 360
1% of savings = 360 ÷ 100 = 3.6
30% of savings = 30% x 360 = 108
30% of savings = 20 u of spending
20 u of spending = 108
1 u of spending = 108 ÷ 20 = 5.4
100 u of spending = 100 x 5.4 = 540
Simon's allowance for each month
= 100% of savings + 100 u of spending
= 360 + 540
= $900
Answer(s): $900