Subtract 80/27 from 81/30
1st number: 2 21/30, 2nd number: 2 26/27
81/30 - 80/27 is -71/270.
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,
80/27 = 80 × 10/27 × 10 = 800/270 - Subtract the two like fractions:
729/270 - 800/270 = 729 - 800/270 = -71/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60-80/27 81/30-80/54 81/90-80/27 81/30-80/81