30/4215/21
630/30 = 21/1 = 21
Oh, dude, you just want me to simplify fractions, huh? Alright, let's do this. So, 21/30 simplifies to 7/10 because you can divide both numbers by 3. Boom, there you go, simplified like a pro.
21/30 = 7/10
It is: 7 and 10
30/63 = 10/21
7/30
7/10
5/21
21/5 is the simplest form.
7/10
21/80 is already in its simplest form