The highest common factor 12 and 28 is 4.So divide both the numerator and the denominator of the ratio, 12/28 by this HCF.
The answer, therefore is 3/7.
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1/4.
Forty two fifty sixths in its simplest form is twenty one twenty eighths.
16/28 = sixteen twenty-eighths = 4/7
17/28 (read like "seventeen over twenty-eight" or "seventeen twenty-eighths"
One hundred twelve over two hundred twenty (112/220) calculates into simplest form as twenty-eight over fifty-five (28/55 or 0.509090909 repeating).