7/12и 5/8 , нок( 12,8)=24 (7*2)/(12*2)=14/24 и (5*3)/(8*3)=15/24
2/9 и 4/15,нок(9,15)=45 (2*5)/(9*5)=10/45 и (4*3)/(15*3)=12/45
7/25 и 2/15, нок (25,15)=75 (7*3)/(25*3)=21/75 и (2*5)/(15*5)=10/45
3/16 и 5/24,нок (16,24)=48 (3*3)/(16*3)=9/48 и (5*2)/(24*2)=10/48