If Adam's income decreases 20% from $400 and then increases by 20%, what is Adam's latest income?
|
Original Income (%) |
New income (u) |
Income ($) |
Before 1 |
100% |
|
$400 |
Change 1 |
- 20% |
|
|
After 1 |
80% |
100 u |
$320 |
Change 2 |
|
+ 20 u |
|
After 2 |
|
120 u |
$384 |
100% of Adam's original income = $400
1% of Adam's original income = 400 ÷ 100 = $4
100% - 20% = 80%
80% of Adam's original income = 80 x 4 = $320
100 u of Adam's new income = $320
1 u of Adam's new income = 320 ÷ 100 = $3.20
100 u + 20 u = 120 u
120% of Adam's new income = 120 x 3.20 = $384
Adam's latest income = $384
Answer(s): $384