PSLE Jack was given a fixed amount of allowance each month. In July, he saved $130 and spent the rest. In August, he saved 10% more and his spending decreased by 20%. How much was Jack's allowance for each month?
|
Savings (%) |
Spending (u) |
Before |
100% $$(n80 |
100 u |
Change |
+ 10% |
- 20 u |
After |
110% |
80 u |
100% of savings = 130
1% of savings = 130 ÷ 100 = 1.3
10% of savings = 10% x 130 = 13
10% of savings = 20 u of spending
20 u of spending = 13
1 u of spending = 13 ÷ 20 = 0.65
100 u of spending = 100 x 0.65 = 65
Jack's allowance for each month
= 100% of savings + 100 u of spending
= 130 + 65
= $195
Answer(s): $195