Subtract 50/70 from 81/10
1st number: 8 1/10, 2nd number: 50/70
81/10 - 50/70 is 517/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
81/10 = 81 × 7/10 × 7 = 567/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
50/70 = 50 × 1/70 × 1 = 50/70 - Subtract the two like fractions:
567/70 - 50/70 = 567 - 50/70 = 517/70 - In mixed form: 727/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20-50/70 81/30-50/70 81/50-50/70 81/70-50/70