Приведите дробь к общему знаменателю 2/15 и5/12,5\12и7/8,7/33и3/77,2/55и5/22,1/72и1/56,1/42и1/54,9/35и11/42

2/15  и 5/12 2*4/(15*4) и 5*5/(12*5) 8/60 и 25/60 5/12 и 7/8 5*2/(12*2) и 7*3/(8*3) 10/24 и 21/24 7/33 и 3/77 7*7/(33*7) и 3*7/(77*3) 49/231 и 21/231 2/55 и 5/22 2*2/(55*2) и 5*5/(22*5) 4/110 и 25/110 1/72 и 1/56 1*7/(8*9*7) и 1*9/(7*8*9) 7/504 и 9/504 1/42 и 1/54 1*9/(7*6*9) и 1*7/(7*6*9) 9/378 и 7/378 9/35 и  11/42 9*6/(7*5*6) и 11*5/(7*5*6) 54/210 и 55/210