Subtract 10/81 from 20/63
20/63 - 10/81 is 110/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
20/63 = 20 × 9/63 × 9 = 180/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
10/81 = 10 × 7/81 × 7 = 70/567 - Subtract the two like fractions:
180/567 - 70/567 = 180 - 70/567 = 110/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63-10/81 20/63-20/81 60/63-10/81 20/63-30/81 20/63-50/81 20/63-70/81