Maria's family has completed 80% of a trip. They have traveled 45 miles. How far is the trip?

56.25 miles

Step-by-step explanation:

we can set up a ratio which would be

45/x = 80/100

45 over x represents the amount complete which is 80 out of 100

cross miltiply and you get 4500=80x

divide both sides by 80 to get x=56.25