Question

Rina finished colouring picture in 9/7 hours.Riva finished colouring the same picture in 4/3hours who work longer? By what fraction was it longer​

Answer 1

For solving this

First we have to make their denominators equal

So find lcm of 7&3 which is 21

Now

9/7*3/3=27/21

4/3*7/7=28/21

so riva worked longer and the fraction is 1/21