Subtract 72/81 from 12/56
12/56 - 72/81 is -85/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 81 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 56 × 81 = 4536,
12/56 = 12 × 81/56 × 81 = 972/4536 - Likewise, for the 2nd fraction, since 81 × 56 = 4536,
72/81 = 72 × 56/81 × 56 = 4032/4536 - Subtract the two like fractions:
972/4536 - 4032/4536 = 972 - 4032/4536 = -3060/4536 - After reducing the fraction, the answer is -85/126
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