Subtract 5/9 from 21/28
21/28 - 5/9 is 7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
5/9 = 5 × 28/9 × 28 = 140/252 - Subtract the two like fractions:
189/252 - 140/252 = 189 - 140/252 = 49/252 - After reducing the fraction, the answer is 7/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-5/9 21/28-10/9 21/56-5/9 21/28-5/18 63/28-5/9 21/28-15/9 21/84-5/9 21/28-5/27 21/28-25/9 21/28-5/45 21/28-35/9 21/28-5/63