PSLE Vaidev was given a fixed amount of allowance each month. In January, he spent $350 and saved the rest. In February, he spent 10% less and his savings increased by 20%. How much was Vaidev's allowance for each month?
|
Spending (%) |
Savings (u) |
Before
|
100% $350 |
100 u
|
Change |
- 10% |
+ 20 u |
After |
90% |
120 u |
100% of spending = 350
1% of spending = 350 ÷ 100 = 3.5
10% of spending = 10% x 350 = 35
10% of spending = 20 u of savings
20 u of savings = 35
1 u of savings = 35 ÷ 20 = 1.75
100 u of savings = 100 x 1.75 = 175
Vaidev's allowance for each month
= 100% of spending + 100 u of savings
= 350 + 175
= $525
Answer(s): $525