Carol is a real estate agent. she earns a 5% commission on each house that she sells. how much will she earn if she sells a house for 144,000

To find how much the commision, you can multiply the percentage to whole cost.
commision = 5% × whole cost
commision = 5% × 144,000
commision = 0.05 × 144,000
commision = 28,800

The commision she earns is 28,800