Subtract 14/81 from 81/21
1st number: 3 18/21, 2nd number: 14/81
81/21 - 14/81 is 2089/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
81/21 = 81 × 27/21 × 27 = 2187/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
14/81 = 14 × 7/81 × 7 = 98/567 - Subtract the two like fractions:
2187/567 - 98/567 = 2187 - 98/567 = 2089/567 - In mixed form: 3388/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/21-28/81 81/42-14/81 81/21-42/81 81/63-14/81 81/21-70/81 81/21-98/81