Subtract 5/21 from 3/5
3/5 - 5/21 is 38/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
3/5 = 3 × 21/5 × 21 = 63/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
5/21 = 5 × 5/21 × 5 = 25/105 - Subtract the two like fractions:
63/105 - 25/105 = 63 - 25/105 = 38/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5-5/21 3/5-10/21 3/10-5/21 3/5-5/42 9/5-5/21 3/5-15/21 3/15-5/21 3/5-5/63 15/5-5/21 3/5-25/21 3/25-5/21 21/5-5/21 3/5-35/21 3/35-5/21