Subtract 72/21 from 27/35, Solve 27/35

Subtract 72/21 from 27/35

1^st number: 27/35, 2^nd number: 3 9/21

27/35 - 72/21 is -93/35.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 35 × 3 = 105,
27/35 = 27 × 3/35 × 3 = 81/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
72/21 = 72 × 5/21 × 5 = 360/105
Subtract the two like fractions:
81/105 - 360/105 = 81 - 360/105 = -279/105
After reducing the fraction, the answer is -93/35

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