Subtract 50/27 from 81/90
1st number: 81/90, 2nd number: 1 23/27
81/90 - 50/27 is -257/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
81/90 = 81 × 3/90 × 3 = 243/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
50/27 = 50 × 10/27 × 10 = 500/270 - Subtract the two like fractions:
243/270 - 500/270 = 243 - 500/270 = -257/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90-50/54 81/90-50/81