Subtract 15/12 from 40/81
1st number: 40/81, 2nd number: 1 3/12
40/81 - 15/12 is -245/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
40/81 = 40 × 4/81 × 4 = 160/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
15/12 = 15 × 27/12 × 27 = 405/324 - Subtract the two like fractions:
160/324 - 405/324 = 160 - 405/324 = -245/324
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