If Adam's income decreases 10% from $3900 and then increases by 30%, what is his latest income?
| |
Original Income (%) |
New income (u) |
Income ($) |
| Before 1 |
100% |
|
$3900 |
| Change 1 |
- 10% |
|
|
| After 1 |
90% |
100 u |
$3510 |
| Change 2 |
|
+ 30 u |
|
| After 2 |
|
130 u |
$4563 |
100% of Adam's original income = $3900
1% of Adam's original income
= 3900 ÷ 100
= $39
100% - 10% = 90%
90% of Adam's original income
= 90 x 39
= $3510
90% of Adam's original income = 100 u of Adam's new income
100 u of Adam's new income = 3510
1 u of Adam's new income
= 3510 ÷ 100
= $35.10
100 u + 30 u = 130 u
130 u of Adam's new income
= 130 x 35.10
= $4563
Adam's latest income = $4563
Answer(s): $4563
