Subtract 10/27 from 81/30
1st number: 2 21/30, 2nd number: 10/27
81/30 - 10/27 is 629/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
81/30 = 81 × 9/30 × 9 = 729/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
10/27 = 10 × 10/27 × 10 = 100/270 - Subtract the two like fractions:
729/270 - 100/270 = 729 - 100/270 = 629/270 - In mixed form: 289/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-20/27 81/60-10/27 81/30-10/54 81/30-30/27 81/90-10/27 81/30-10/81 81/30-50/27 81/30-70/27