Mario walks his dog once every 8 days in the park, while todd walks his dog once every 14 days. today, both mario and todd walked their dogs in the park. in how many more days will both boys walk their dogs in the park on the same day?

Assuming both Mario and Todd just walked today.

Mario is every 8 days

Todd is every 14 days.

The days that will coincide is the Least Common Multiple (LCM) of 8 and 14

  2 /    8    14
  2  /    4      7
  2  /     2    7
  7 /     1     7
    /      1     1

The LCM =  2 * 2* 2* 7 =  56

The will both walk together in the next 56 days.

For being nice i appreciate it but abc