Subtract 98/63 from 81/21
1st number: 3 18/21, 2nd number: 1 35/63
81/21 - 98/63 is 145/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
81/21 = 81 × 3/21 × 3 = 243/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
98/63 = 98 × 1/63 × 1 = 98/63 - Subtract the two like fractions:
243/63 - 98/63 = 243 - 98/63 = 145/63 - In mixed form: 219/63
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