How many hours in 2.25pm to 4.50pm?

Answer 1

First you have given you times a decimals = people do not use decimal time (there are 60 min in an your not 100) so I am going to assume that the figures after the decimal point are minutes past the hour. I am also assuming both times on on the same day. 50 mins past 4 - 25 mins past 2 = 2 hours 25 mins.