21/20 This fraction cannot be simplified any further.
21 over 49 in lowest terms is 3/7
The lowest term of 172 over 84 is 43/21 (in fraction form) or 21/21 (as a mixed number).
10 over 42 in lowest terms = 5/21
5/21 is in its simplest form.
The fraction 20/21 is already in lowest terms.
It is: 7/1
2/7
3/4
24/7
7/10
7/9