Сроооооооооооочно!!!!!!!!!!!!!!!!!!!!!!!!!

1- 5/6,  5/6,   3/2

2- 3/16<5/24; 13/330<9/220

3 a7/8-5/6=21/24-20/24=1/24

b13/16+7/24=39/48+14/48=53/48

c- 19/20-5/12+9/5=57/60-25/60+108/60=140/60