Subtract 21/81 from 8/14
8/14 - 21/81 is 59/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 14 × 81 = 1134,
8/14 = 8 × 81/14 × 81 = 648/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
21/81 = 21 × 14/81 × 14 = 294/1134 - Subtract the two like fractions:
648/1134 - 294/1134 = 648 - 294/1134 = 354/1134 - After reducing the fraction, the answer is 59/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/14-21/81 8/14-42/81 8/28-21/81 24/14-21/81 8/14-63/81 8/42-21/81 40/14-21/81 8/70-21/81 56/14-21/81 8/98-21/81