PSLE Cole was given a fixed amount of allowance each month. In June, he saved $90 and spent the rest. In July, he saved 20% less and his spending increased by 30%. How much was Cole's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $90 |
100 u
|
Change |
- 20% |
+ 30 u |
After |
80% |
130 u |
100% of savings = 90
1% of savings = 90 ÷ 100 = 0.9
20% of savings = 20% x 90 = 18
20% of savings = 30 u of spending
30 u of spending = 18
1 u of spending = 18 ÷ 30 = 0.6
100 u of spending = 100 x 0.6 = 60
Cole's allowance for each month
= 100% of savings + 100 u of spending
= 90 + 60
= $150
Answer(s): $150