Subtract 35/81 from 21/14
1st number: 1 7/14, 2nd number: 35/81
21/14 - 35/81 is 173/162.
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,
21/14 = 21 × 81/14 × 81 = 1701/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
35/81 = 35 × 14/81 × 14 = 490/1134 - Subtract the two like fractions:
1701/1134 - 490/1134 = 1701 - 490/1134 = 1211/1134 - After reducing the fraction, the answer is 173/162
- In mixed form: 111/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-35/81 21/14-70/81 21/28-35/81 63/14-35/81 21/42-35/81 21/70-35/81 21/98-35/81