If I spent 1/4 hour on the phone and 5/8 hours on the computer how much time did I spend on the two activities

Question

If I spent 1/4 hour on the phone and 5/8 hours on the computer how much time did I spend on the two activities

Answer 1

52.5 minutes

if you change 1/4 into eighths you get 2/8

5/8+2/8=7/8

one hour = 60 minutes

so 60 times (7/8)= 52.5

Answer 2

u spend 15min on phone and 37.5min in pc

total=52.5min

Answer 3

you spent 7/8 of an hour on both activities

1/4 = 2/8 so...

2/8 + 5/8 = 7/8