If Adam's income decreases 20% from $800 and then increases by 20%, what is Adam's latest income?
|
Original Income (%) |
New income (u) |
Income ($) |
Before 1 |
100% |
|
$800 |
Change 1 |
- 20% |
|
|
After 1 |
80% |
100 u |
$640 |
Change 2 |
|
+ 20 u |
|
After 2 |
|
120 u |
$768 |
100% of Adam's original income = $800
1% of Adam's original income = 800 ÷ 100 = $8
100% - 20% = 80%
80% of Adam's original income = 80 x 8 = $640
100 u of Adam's new income = $640
1 u of Adam's new income = 640 ÷ 100 = $6.40
100 u + 20 u = 120 u
120% of Adam's new income = 120 x 6.40 = $768
Adam's latest income = $768
Answer(s): $768