Subtract 7/81 from 63/42
1st number: 1 21/42, 2nd number: 7/81
63/42 - 7/81 is 229/162.
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,
63/42 = 63 × 27/42 × 27 = 1701/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
7/81 = 7 × 14/81 × 14 = 98/1134 - Subtract the two like fractions:
1701/1134 - 98/1134 = 1701 - 98/1134 = 1603/1134 - After reducing the fraction, the answer is 229/162
- In mixed form: 167/162
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