The movie starts at 3:15p.m and ends at 5:08 p.m how long is the movie?

#5:08 p.m - 3:15 p.m#

#"one hour = 60 minutes"#

#:. 5:08 = 5 * 60 + 08 = 308 min#

#3:15 = 3 * 60 * 15 = 195 min"#

#5:08 - 3;15 = 308 - 195 = 113 min#

#=> 113 / 60 = 1 Hr : 53 " Min"#

#3:15-4:15# is #1# hour

#4:15-5:08# is #53# minutes

We get:
from: #3:15# to #4:00# elapsed: #45#min
from: #4:00# to #5:00# elapsed: #60#min
from: #5:00# to #5:08# elapsed: #8#min

Total:

#45+60+8=113#min or #1#hour and #53#min

Start time 3:15p.m (15 minutes after 3pm)
End time 5:08 p.m (8 minutes after 5pm)

Subtract the start time from the end time to find the time elapsed.
# 5:08"pm" - 3:15"pm"#

Both times are "pm" (afternoon) so we don't need to account for hours changing back to 1 after 12

Subtract minutes first...
#08 - 15 = -7#

It's not useful to have negative time, so convert 1 of the end time hours to minutes and try again.

1 hour = 60 minutes, so add 60 to 08 and subtract 1 from 5

End time 5:08 becomes 4:68pm
(68 minutes after 4pm is 8 minutes after 5pm).

Subtract minutes...
#68 - 15 = 53# so minutes elapsed = 53

Then hours...
# 4 - 3 = 1# so hours elapsed = 1

Total time elapsed = 1 hour 53 minutes