10/21 is in its simplest form.
Since the numbers 20 and 21 share no common positive integer factors, 20/21 is expressed in its simplest form.
Twenty-one hundredths.
21
10/21 is in its simplest form.
3/5
If you take it to thirty-fifths, you have 21 35ths and 25 35ths. halfway is 23 35ths.
1/3
123/500
You cannot because the question is missing a number between 6 and 35ths.
7/13 is already in its simplest form
3/7
one over three
6/7
5/7 cannot be simplified further.
4/154 / 15 = 0.26666666720 / 75 = 0.266666667
65