Subtract 8/21 from 8/35
8/35 - 8/21 is -16/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
8/35 = 8 × 3/35 × 3 = 24/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
8/21 = 8 × 5/21 × 5 = 40/105 - Subtract the two like fractions:
24/105 - 40/105 = 24 - 40/105 = -16/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/35-8/21 8/35-16/21 8/70-8/21 8/35-8/42 24/35-8/21 8/35-24/21 8/35-8/63 40/35-8/21 8/35-40/21 56/35-8/21 8/35-56/21