Answer:
blocks
Explanation:
If it takes 15 minutes to walk 7 1/2 blocks, it should be 15:17
The left side is minutes and the right side is the number of blocks
15:17
1: ? Since we are figuring out how many blocks he can walk in a minute, the left side is 1 and the right side is a question mark because we have not figured it out yet.
15: 17
Divide by 15 on both sides because that is the "distance" from 15 to1
1 : ?
1:
So the answer is