Subtract 50/28 from 21/30
1st number: 21/30, 2nd number: 1 22/28
21/30 - 50/28 is -38/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
50/28 = 50 × 15/28 × 15 = 750/420 - Subtract the two like fractions:
294/420 - 750/420 = 294 - 750/420 = -456/420 - After reducing the fraction, the answer is -38/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-50/28 21/60-50/28 21/30-50/56 63/30-50/28 21/90-50/28 21/30-50/84