6 over 4 is the same as 21 over 14 because if you set it up as a proportion and do 6*14 and 21*4 it would equal the same thing (which would be 84)
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Yes, it is. 6/21 =2/7 =4/14
87/21 - 73/21 = 14/21 = 2/3
Expressed as a proper fraction in its simplest form, 10/15 + 4/14 = 20/21.
4/7, 8/14, 12/21
It is: 2/7+5/14 is the same as 4/14+5/14 = 9/14