Subtract 30/63 from 56/81
56/81 - 30/63 is 122/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
56/81 = 56 × 7/81 × 7 = 392/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
30/63 = 30 × 9/63 × 9 = 270/567 - Subtract the two like fractions:
392/567 - 270/567 = 392 - 270/567 = 122/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/81-60/63 56/81-90/63