Subtract 5/81 from 7/63
7/63 - 5/81 is 4/81.
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,
7/63 = 7 × 9/63 × 9 = 63/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
5/81 = 5 × 7/81 × 7 = 35/567 - Subtract the two like fractions:
63/567 - 35/567 = 63 - 35/567 = 28/567 - After reducing the fraction, the answer is 4/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-5/81 7/63-10/81 21/63-5/81 7/63-15/81 35/63-5/81 7/63-25/81 49/63-5/81 7/63-35/81