PSLE Valen was given a fixed amount of allowance each month. In November, he saved $140 and spent the rest. In December, he saved 10% less and his spending increased by 20%. How much was Valen's allowance for each month?
|
Savings (%) |
Spending (u) |
Before
|
100% $140 |
100 u
|
Change |
- 10% |
+ 20 u |
After |
90% |
120 u |
100% of savings = 140
1% of savings = 140 ÷ 100 = 1.4
10% of savings = 10% x 140 = 14
10% of savings = 20 u of spending
20 u of spending = 14
1 u of spending = 14 ÷ 20 = 0.7
100 u of spending = 100 x 0.7 = 70
Valen's allowance for each month
= 100% of savings + 100 u of spending
= 140 + 70
= $210
Answer(s): $210