Subtract 16/24 from 1/21
1/21 - 16/24 is -13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
16/24 = 16 × 7/24 × 7 = 112/168 - Subtract the two like fractions:
8/168 - 112/168 = 8 - 112/168 = -104/168 - After reducing the fraction, the answer is -13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-16/24 1/21-32/24 1/42-16/24 1/21-16/48 3/21-16/24 1/21-48/24 1/63-16/24 1/21-16/72 5/21-16/24 1/21-80/24 7/21-16/24