Subtract 21/20 from 50/84
1st number: 50/84, 2nd number: 1 1/20
50/84 - 21/20 is -191/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
50/84 = 50 × 5/84 × 5 = 250/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Subtract the two like fractions:
250/420 - 441/420 = 250 - 441/420 = -191/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/84-42/20 50/84-21/40 50/84-63/20 50/84-21/60