PSLE Tommy was given a fixed amount of allowance each month. In June, he saved $470 and spent the rest. In July, he saved 30% less and his spending increased by 20%. How much was Tommy's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $470 |
100 u
|
Change |
- 30% |
+ 20 u |
After |
70% |
120 u |
100% of savings = 470
1% of savings = 470 ÷ 100 = 4.7
30% of savings = 30% x 470 = 141
30% of savings = 20 u of spending
20 u of spending = 141
1 u of spending = 141 ÷ 20 = 7.05
100 u of spending = 100 x 7.05 = 705
Tommy's allowance for each month
= 100% of savings + 100 u of spending
= 470 + 705
= $1175
Answer(s): $1175