Question

почему верны равенства:3/8=6/16;11/15=33/45;7/9=21/27;5/12=25/60

Answer 1

3/8=(3*2)/(8*2)=6/18
11/15=(11*3)/(15*3)=33/45
7/9=(7*3)/(9*3)=21/27
5/12=(5*5)/(12*5)=25/60