Subtract 54/28 from 50/21
1st number: 2 8/21, 2nd number: 1 26/28
50/21 - 54/28 is 19/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
50/21 = 50 × 4/21 × 4 = 200/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
54/28 = 54 × 3/28 × 3 = 162/84 - Subtract the two like fractions:
200/84 - 162/84 = 200 - 162/84 = 38/84 - After reducing the fraction, the answer is 19/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-54/28 50/21-54/56 50/63-54/28 50/21-54/84