Subtract 15/4 from 56/81
1st number: 56/81, 2nd number: 3 3/4
56/81 - 15/4 is -991/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
56/81 = 56 × 4/81 × 4 = 224/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
15/4 = 15 × 81/4 × 81 = 1215/324 - Subtract the two like fractions:
224/324 - 1215/324 = 224 - 1215/324 = -991/324
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