Subtract 21/3 from 9/28
1st number: 9/28, 2nd number: 7 0/3
9/28 - 21/3 is -187/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 3 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
9/28 = 9 × 3/28 × 3 = 27/84 - Likewise, for the 2nd fraction, since 3 × 28 = 84,
21/3 = 21 × 28/3 × 28 = 588/84 - Subtract the two like fractions:
27/84 - 588/84 = 27 - 588/84 = -561/84 - After reducing the fraction, the answer is -187/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-21/3 9/28-42/3 9/56-21/3 9/28-21/6 27/28-21/3 9/28-63/3 9/84-21/3 9/28-21/9 45/28-21/3 9/28-21/15 63/28-21/3