Roberto wants to clean up his neighborhood by picking up trash. The total distance around his block is 1 3/4 of a mile. He decides to do this over a two-day period. If he walks 5/8 of a mile on the first day, how far does he need to walk the second day to pick up trash?(1 point)
To find how far Roberto needs to walk on the second day, we need to subtract the distance he walked on the first day (5/8 mile) from the total distance around the block (1 3/4 mile).
First, let's convert 1 3/4 mile to an improper fraction: 1 3/4 = 7/4 mile.
Next, let's subtract 5/8 mile from 7/4 mile: 7/4 - 5/8 = (7*2)/(4*2) - 5/8 = 14/8 - 5/8 = 9/8.
Therefore, Roberto needs to walk 9/8 mile on the second day to pick up trash. Answer: \boxed{9/8}.