Question

What should be added to the sum of 13/15 and 27/20 to get 91/60?

Answer 1

Answer:

Let the no. be x

13/15+27/20+x=91/60

(52+81+60x)/60=91/60

60x=91-133

x=-7/10

Answer 2

Let the number required be x

13/15 + 27/20 = 133/60

91/60 - 133/60 = x

x = -7/10

:-)