a,25/53=25/53
2525/5353=25.101/53.101=25/53
=>2525/5353=25/53
252525/535353=25.10101/53.10101=25/53
=>252525/535353=25/53
=>2525/53=25/53
=>252525/535353=2525/5353=25/53
b,37/41=37/41
3737/4141=37.101/41.101=37/41
=> 3737/4141=37/41
373737/414141=37.10101/41.10101=37/41
=>ba số đấy bằng nhau