PSLE Vaidev was given a fixed amount of allowance each month. In May, he spent $190 and saved the rest. In June, he spent 20% more and his savings decreased by 10%. How much was Vaidev's allowance for each month?
|
Spending (%) |
Savings (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 20% |
- 10 u |
After |
120% |
90 u |
100% of spending = 190
1% of spending = 190 ÷ 100 = 1.9
20% of spending = 20% x 190 = 38
20% of spending = 10 u of savings
10 u of savings = 38
1 u of savings = 38 ÷ 10 = 3.8
100 u of savings = 100 x 3.8 = 380
Vaidev's allowance for each month
= 100% of spending + 100 u of savings
= 190 + 380
= $570
Answer(s): $570