Subtract 4/81 from 75/21
1st number: 3 12/21, 2nd number: 4/81
75/21 - 4/81 is 1997/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
75/21 = 75 × 27/21 × 27 = 2025/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
4/81 = 4 × 7/81 × 7 = 28/567 - Subtract the two like fractions:
2025/567 - 28/567 = 2025 - 28/567 = 1997/567 - In mixed form: 3296/567
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