How do you know six over six and one are equivalent

They are equal because let's say you have 6 slices of pizza and you and 5 friends came over to your house to have pizza all of you had one slice because their were 6 slices in the beginning and you and your 5 friends had one slice so that is 1 whole pizza that you and you friend ate

6/6 = 1

If you divide 6 by 6 it equals 1 that's why the statement is true;

6/6 = 1

1 = 1