Ann started reading at 4:00 and finished at 4:20 p. M. Through what fraction of a circle did the minute hand turn?

1/3

Step-by-step explanation:

Turned 20 minutes, so the minute hand turned 20 times per hour

There are 60 minutes in 1 hour, so the minute hand turns 60 times per hour

Therefore, the fraction is 20/60, simplified to 1/3