Решить; вычислите 1/2/3/4; 5/12/2/3; 4/9/2/3,; 8/15/4/5; 2/5/6/25; 3/8/1/4:

1/2/3/4=1/2*4/3=1/1*2/3=2/3;
5/12/2/3=5/12*3/2=5/4*1/2=5/8;
4/9/2/3=4/9*3/2=2/9*3/1=2/3*1/1=2/3,;
8/15/4/5=8/15*5/4=2/15*5/1=2/3*1/1=2/3;
2/5/6/25=2/5*25/6=1/5*25/3=1/1*5/3=5/3=2 2/3
3/8/1/4=3/8*4/1=3/2*1/1=3/2=1 1/2