Subtract 2/21 from 81/3
1st number: 27 0/3, 2nd number: 2/21
81/3 - 2/21 is 565/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
81/3 = 81 × 7/3 × 7 = 567/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
2/21 = 2 × 1/21 × 1 = 2/21 - Subtract the two like fractions:
567/21 - 2/21 = 567 - 2/21 = 565/21 - In mixed form: 2619/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/3-4/21 81/6-2/21 81/3-2/42 81/3-6/21 81/9-2/21 81/3-2/63 81/3-10/21 81/15-2/21 81/3-14/21 81/21-2/21