PSLE Ken was given a fixed amount of allowance each month. In January, he spent $130 and saved the rest. In February, he spent 20% less and his savings increased by 10%. How much was Ken's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $130 |
100 u
|
Change |
- 20% |
+ 10 u |
After |
80% |
110 u |
100% of spending = 130
1% of spending = 130 ÷ 100 = 1.3
20% of spending = 20% x 130 = 26
20% of spending = 10 u of savings
10 u of savings = 26
1 u of savings = 26 ÷ 10 = 2.6
100 u of savings = 100 x 2.6 = 260
Ken's allowance for each month
= 100% of spending + 100 u of savings
= 130 + 260
= $390
Answer(s): $390