PSLE Ken was given a fixed amount of allowance each month. In March, he spent $280 and saved the rest. In April, he spent 10% less and his savings increased by 40%. How much was Ken's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $280 |
100 u
|
Change |
- 10% |
+ 40 u |
After |
90% |
140 u |
100% of spending = 280
1% of spending = 280 ÷ 100 = 2.8
10% of spending = 10% x 280 = 28
10% of spending = 40 u of savings
40 u of savings = 28
1 u of savings = 28 ÷ 40 = 0.7
100 u of savings = 100 x 0.7 = 70
Ken's allowance for each month
= 100% of spending + 100 u of savings
= 280 + 70
= $350
Answer(s): $350