Subtract 50/56 from 28/21
1st number: 1 7/21, 2nd number: 50/56
28/21 - 50/56 is 37/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
28/21 = 28 × 8/21 × 8 = 224/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
50/56 = 50 × 3/56 × 3 = 150/168 - Subtract the two like fractions:
224/168 - 150/168 = 224 - 150/168 = 74/168 - After reducing the fraction, the answer is 37/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-50/56 28/42-50/56 84/21-50/56 28/63-50/56