Question

one third of which number must be subtracted from 7 upon 11 to give 24 upon 55

Answer 1

18 /11 must be subtracted from 7/11 to get 24/55

Answer 2

let the no. be
7/11-x/3=24/55
21-11x/33=24/55
21-11x=72/5
11x=21-72/5
11x=105-72/5
11x=33/5
x=3/5