Subtract 5/81 from 9/70
9/70 - 5/81 is 379/5670.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
9/70 = 9 × 81/70 × 81 = 729/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
5/81 = 5 × 70/81 × 70 = 350/5670 - Subtract the two like fractions:
729/5670 - 350/5670 = 729 - 350/5670 = 379/5670
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/70-5/81 9/70-10/81 27/70-5/81 9/70-15/81 45/70-5/81 9/70-25/81 63/70-5/81 9/70-35/81