7:30, 7:55, 8:20, ...

7:30, 7:55,8:20,8:45,9:00, 9:25

Step-by-step explanation:

We subtract 7:55 from 8:20

1) 8:20

- 7:55

2) 7:2 60

-7:55

3) 0:25

we put 60 (because it's time and we put in in 1 hour 60 minutes) and we take 1 hour from the 8 to put the 60 minutes, so we continue adding 25 minutes to the time.