Respuesta :
The fraction would probably be the speed as well so here:
You do 20/45 which simplifies to 4/9
So the speed/fraction for this problem is 4/9 (feet per second)
P.S. I'm sorry if this is hard to understand
20ft = 45 sec
divide both by 5 you get
4ft = 9 sec
4ft every 9 seconds would be your answer unless you want a fraction.
1 ft = 2 1/4 seconds
I hope I helped. If you think I'm worthy a Brainliest answer would be nice :D