15.15/4 y 75/35 = 15.35/4.75 = 525/300 no es equivalente

33/42 y 132/168 = 33.168/42.132 = 5544/5544 = 1 si es equivalente

17/62 y 51/185 = 17.185/62.51 = 3145/3162 no es equivalente