Subtract 8/32 from 2/21
2/21 - 8/32 is -13/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 21 × 32 = 672,
2/21 = 2 × 32/21 × 32 = 64/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
8/32 = 8 × 21/32 × 21 = 168/672 - Subtract the two like fractions:
64/672 - 168/672 = 64 - 168/672 = -104/672 - After reducing the fraction, the answer is -13/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-8/32 2/21-16/32 2/42-8/32 2/21-8/64 6/21-8/32 2/21-24/32 2/63-8/32 2/21-8/96 10/21-8/32 2/21-40/32 14/21-8/32 2/21-56/32