Subtract 20/81 from 9/8
1st number: 1 1/8, 2nd number: 20/81
9/8 - 20/81 is 569/648.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
9/8 = 9 × 81/8 × 81 = 729/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
20/81 = 20 × 8/81 × 8 = 160/648 - Subtract the two like fractions:
729/648 - 160/648 = 729 - 160/648 = 569/648
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