Question

how do i convert 100 yards in 12 seconds to yards per second

Answer 1

To convert from 100 yds/12 seconds to yards per second, divide both sides by the number 12.
                                  _
You'll end up with 8.3 yards per second.

Answer 2

you divide 100 and 12. (100/12) once u divide it, you will get 8.33 seconds :)