PSLE Jeremy was given a fixed amount of allowance each month. In May, he spent $70 and saved the rest. In June, he spent 30% less and his savings increased by 20%. How much was Jeremy's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $70 |
100 u
|
Change |
- 30% |
+ 20 u |
After |
70% |
120 u |
100% of spending = 70
1% of spending = 70 ÷ 100 = 0.7
30% of spending = 30% x 70 = 21
30% of spending = 20 u of savings
20 u of savings = 21
1 u of savings = 21 ÷ 20 = 1.05
100 u of savings = 100 x 1.05 = 105
Jeremy's allowance for each month
= 100% of spending + 100 u of savings
= 70 + 105
= $175
Answer(s): $175