Subtract 50/90 from 27/30
27/30 - 50/90 is 31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
27/30 = 27 × 3/30 × 3 = 81/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
50/90 = 50 × 1/90 × 1 = 50/90 - Subtract the two like fractions:
81/90 - 50/90 = 81 - 50/90 = 31/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-50/90 27/60-50/90 81/30-50/90 27/90-50/90