Subtract 50/60 from 5/21
5/21 - 50/60 is -25/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
5/21 = 5 × 20/21 × 20 = 100/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
50/60 = 50 × 7/60 × 7 = 350/420 - Subtract the two like fractions:
100/420 - 350/420 = 100 - 350/420 = -250/420 - After reducing the fraction, the answer is -25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-50/60 5/42-50/60 15/21-50/60 5/63-50/60 25/21-50/60 35/21-50/60