3/20*(7/12-1/2)+79/80

Question

3/20*(7/12-1/2)+79/80

Answer 1

3/20*(7/12-1/2)+79/80=1

Answer 2

3/20*(7/12-1/2)+79/80 =3/20*(7/12-6/12)+79/80 =3/20*1/12+79/80 =

=1/80+79/80 =80/80=1