It is any fraction of the form (21*k)/(84*k) where k is a non-zero integer, or a common factor of the two.
equivalent fractions of 3/21 = 6/42, 9/63, 12/84,...
32/21
21/25
It is: 36/84 = 3/7 simplified
18 over 21
equivalent fractions of 3/21 = 6/42, 9/63, 12/84,...
21/25
Some equivalent fractions of 49/84 are: 7/12 = 14/24 = 21/36 = 28/48
76/84 = 19/21
2 over 21
21/25
32/21
The lowest term of 172 over 84 is 43/21 (in fraction form) or 21/21 (as a mixed number).
It is: 36/84 = 3/7 simplified
18 over 21
2/6, 7/21, 1/3, 28/84, etc, etc, ETC.
The fraction 8/84 is equal to 2/21. (The number 8 "over" the number 84 would be 92.)