Subtract 30/12 from 10/81
1st number: 10/81, 2nd number: 2 6/12
10/81 - 30/12 is -385/162.
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,
10/81 = 10 × 4/81 × 4 = 40/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
30/12 = 30 × 27/12 × 27 = 810/324 - Subtract the two like fractions:
40/324 - 810/324 = 40 - 810/324 = -770/324 - After reducing the fraction, the answer is -385/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/81-30/12 10/81-60/12 10/81-30/24 30/81-30/12 10/81-90/12 10/81-30/36 50/81-30/12 10/81-30/60 70/81-30/12 10/81-30/84