Subtract 4/35 from 2/21
2/21 - 4/35 is -2/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
4/35 = 4 × 3/35 × 3 = 12/105 - Subtract the two like fractions:
10/105 - 12/105 = 10 - 12/105 = -2/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-4/35 2/21-8/35 2/42-4/35 2/21-4/70 6/21-4/35 2/21-12/35 2/63-4/35 10/21-4/35 2/21-20/35 14/21-4/35 2/21-28/35