Subtract 81/7 from 63/3
1st number: 21 0/3, 2nd number: 11 4/7
63/3 - 81/7 is 66/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
63/3 = 63 × 7/3 × 7 = 441/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
81/7 = 81 × 3/7 × 3 = 243/21 - Subtract the two like fractions:
441/21 - 243/21 = 441 - 243/21 = 198/21 - After reducing the fraction, the answer is 66/7
- In mixed form: 93/7
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