If Adam's income decreases 30% from $900 and then increases by 30%, what is Adam's latest income?
| |
Original Income (%) |
New income (u) |
Income ($) |
| Before 1 |
100% |
|
$900 |
| Change 1 |
- 30% |
|
|
| After 1 |
70% |
100 u |
$630 |
| Change 2 |
|
+ 30 u |
|
| After 2 |
|
130 u |
$819 |
100% of Adam's original income = $900
1% of Adam's original income = 900 ÷ 100 = $9
100% - 30% = 70%
70% of Adam's original income = 70 x 9 = $630
100 u of Adam's new income = $630
1 u of Adam's new income = 630 ÷ 100 = $6.30
100 u + 30 u = 130 u
130% of Adam's new income = 130 x 6.30 = $819
Adam's latest income = $819
Answer(s): $819
