Subtract 98/45 from 81/21
1st number: 3 18/21, 2nd number: 2 8/45
81/21 - 98/45 is 529/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
81/21 = 81 × 15/21 × 15 = 1215/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
98/45 = 98 × 7/45 × 7 = 686/315 - Subtract the two like fractions:
1215/315 - 686/315 = 1215 - 686/315 = 529/315 - In mixed form: 1214/315
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