Subtract 63/81 from 25/42
25/42 - 63/81 is -23/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
25/42 = 25 × 27/42 × 27 = 675/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
63/81 = 63 × 14/81 × 14 = 882/1134 - Subtract the two like fractions:
675/1134 - 882/1134 = 675 - 882/1134 = -207/1134 - After reducing the fraction, the answer is -23/126
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