PSLE Ivan was given a fixed amount of allowance each month. In February, he saved $120 and spent the rest. In March, he saved 40% less and his spending increased by 20%. How much was Ivan's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $120 |
100 u
|
Change |
- 40% |
+ 20 u |
After |
60% |
120 u |
100% of savings = 120
1% of savings = 120 ÷ 100 = 1.2
40% of savings = 40% x 120 = 48
40% of savings = 20 u of spending
20 u of spending = 48
1 u of spending = 48 ÷ 20 = 2.4
100 u of spending = 100 x 2.4 = 240
Ivan's allowance for each month
= 100% of savings + 100 u of spending
= 120 + 240
= $360
Answer(s): $360