If you mean 42 then as improper fractions they are 42/1 and 84/2
two fractions are equivalent 21 over 23 = 42/46, 63/69
6 over 10
28/34, 42/51
42/46 and 63/69 are equivalent to 21/23.
24/21 96/82 240/210 These are only three equivalent fractions. There are an infinite amount of equivalent fractions for 48/42.
9/21 & 3/7
1/7 and 2/14
28/54, 42/81
10/28, 15/42
28/34, 42/51
They are: 42/47 and 126/141
140/420 and 1400/4200 are two simple ones to generate.