Subtract 70/81 from 84/63
1st number: 1 21/63, 2nd number: 70/81
84/63 - 70/81 is 38/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
84/63 = 84 × 9/63 × 9 = 756/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
70/81 = 70 × 7/81 × 7 = 490/567 - Subtract the two like fractions:
756/567 - 490/567 = 756 - 490/567 = 266/567 - After reducing the fraction, the answer is 38/81
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