Subtract 50/18 from 21/10
1st number: 2 1/10, 2nd number: 2 14/18
21/10 - 50/18 is -61/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
50/18 = 50 × 5/18 × 5 = 250/90 - Subtract the two like fractions:
189/90 - 250/90 = 189 - 250/90 = -61/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-50/18 21/20-50/18 21/10-50/36 63/10-50/18 21/30-50/18 21/10-50/54 21/50-50/18 21/10-50/90 21/70-50/18