7/11
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The fraction 12/77 is already in the simplest form.
28/77 in simplest form =4/11GCF of 28 & 77 = 7Divide 28 & 77 by their GCF:28 ÷ 7 = 477 ÷ 7 = 11thus, 28/77 = 4/11 in simplest form
308/1000 = 77/250.
7/9 (seven over nine) found by dividing the 77 and then the 99 by 11.
The greatest common factor of 77 and 121 is 11, so you can reduce the fraction 77/121 by dividing both the numerator and denominator by 11 to get 7/11.