PSLE Luke was given a fixed amount of allowance each month. In January, he saved $180 and spent the rest. In February, he saved 10% less and his spending increased by 40%. How much was Luke's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $180 |
100 u
|
Change |
- 10% |
+ 40 u |
After |
90% |
140 u |
100% of savings = 180
1% of savings = 180 ÷ 100 = 1.8
10% of savings = 10% x 180 = 18
10% of savings = 40 u of spending
40 u of spending = 18
1 u of spending = 18 ÷ 40 = 0.45
100 u of spending = 100 x 0.45 = 45
Luke's allowance for each month
= 100% of savings + 100 u of spending
= 180 + 45
= $225
Answer(s): $225