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42/2 = 21/1 = 21
1/21
The simplest form of 21 over 42 is 21/42 = 1/2
28 over 42 in simplest form is 2/3
42/189 in simplest form is 2/9
42/63 = 2/3
42/189= 2/9
It is: 2/7
the answer is 2/5
2/3
3/2
7/2