Subtract 16/35 from 7/21
7/21 - 16/35 is -13/105.
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,
7/21 = 7 × 5/21 × 5 = 35/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
16/35 = 16 × 3/35 × 3 = 48/105 - Subtract the two like fractions:
35/105 - 48/105 = 35 - 48/105 = -13/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-16/35 7/21-32/35 7/42-16/35 7/21-16/70 7/21-48/35 7/63-16/35 35/21-16/35 7/21-80/35 49/21-16/35