Subtract 50/63 from 28/81
28/81 - 50/63 is -254/567.
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,
28/81 = 28 × 7/81 × 7 = 196/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
50/63 = 50 × 9/63 × 9 = 450/567 - Subtract the two like fractions:
196/567 - 450/567 = 196 - 450/567 = -254/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/81-50/63 84/81-50/63