Answer:
Jonny spent 0.625 minute or 37.5 seconds on each pie.
Explanation:
At a pie eating contest Jonny ate 8 pies in 5 minutes.
He spend time on eating each pie =

= 0.625 minutes
to convert 0.625 minutes to seconds we multiply it by 60
0.625 × 60 = 37.5 seconds.
Jonny spent 0.625 minute or 37.5 seconds on each pie.