To simplify the fraction 21/39, you'll want to find the greatest common divisor (GCD) of the numerator (21) and the denominator (39), and then divide both by that GCD.
The factors of 21 are , 1 , 3 , 7 , 21 .
The factors of 39 are , 1 , 3 , 13 , 39 .
The largest number that appears in both lists is 3, so the GCD of 12 and 36 is 3.
21 ÷ 3 = 7
39 ÷ 3 = 13
So, the simplified form of 21/39 is 7/13.
The fraction 21/39 is equivalent to 7/13 when simplified.
twenty-one over 39
seven over 13
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Our tool uses advanced algorithms to find the greatest common divisor (GCD) of the numerator and denominator. It then divides both numbers by the GCD to obtain the simplified form.