Subtract 27/84 from 21/3
1st number: 7 0/3, 2nd number: 27/84
21/3 - 27/84 is 187/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
21/3 = 21 × 28/3 × 28 = 588/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
27/84 = 27 × 1/84 × 1 = 27/84 - Subtract the two like fractions:
588/84 - 27/84 = 588 - 27/84 = 561/84 - After reducing the fraction, the answer is 187/28
- In mixed form: 619/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-27/84 21/3-54/84 21/6-27/84 63/3-27/84 21/3-81/84 21/9-27/84 21/15-27/84