If Adam's income decreases 10% from $400 and then increases by 10%, what is Adam's latest income?
|
Original Income (%) |
New income (u) |
Income ($) |
Before 1 |
100% |
|
$400 |
Change 1 |
- 10% |
|
|
After 1 |
90% |
100 u |
$360 |
Change 2 |
|
+ 10 u |
|
After 2 |
|
110 u |
$396 |
100% of Adam's original income = $400
1% of Adam's original income = 400 ÷ 100 = $4
100% - 10% = 90%
90% of Adam's original income = 90 x 4 = $360
100 u of Adam's new income = $360
1 u of Adam's new income = 360 ÷ 100 = $3.60
100 u + 10 u = 110 u
110% of Adam's new income = 110 x 3.60 = $396
Adam's latest income = $396
Answer(s): $396