Subtract 42/81 from 20/8
1st number: 2 4/8, 2nd number: 42/81
20/8 - 42/81 is 107/54.
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,
20/8 = 20 × 81/8 × 81 = 1620/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
42/81 = 42 × 8/81 × 8 = 336/648 - Subtract the two like fractions:
1620/648 - 336/648 = 1620 - 336/648 = 1284/648 - After reducing the fraction, the answer is 107/54
- In mixed form: 153/54
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