Subtract 30/14 from 81/70
1st number: 1 11/70, 2nd number: 2 2/14
81/70 - 30/14 is -69/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 14 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
81/70 = 81 × 1/70 × 1 = 81/70 - Likewise, for the 2nd fraction, since 14 × 5 = 70,
30/14 = 30 × 5/14 × 5 = 150/70 - Subtract the two like fractions:
81/70 - 150/70 = 81 - 150/70 = -69/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/70-60/14 81/70-30/28 81/70-90/14 81/70-30/42 81/70-30/70 81/70-30/98