Ryan is on his way home in his car. He has driven 21 miles so far, which is one-third of the way home. What is the total length of his drive?
If Ryan has driven 21 miles and that represents one-third of the total way home, you can calculate the total length of his drive by multiplying the distance he has covered by 3 (since 1/3 multiplied by 3 equals the whole or 1).
So the total length of his drive is 21 miles * 3 = 63 miles.