Subtract 18/32 from 2/21
2/21 - 18/32 is -157/336.
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,
18/32 = 18 × 21/32 × 21 = 378/672 - Subtract the two like fractions:
64/672 - 378/672 = 64 - 378/672 = -314/672 - After reducing the fraction, the answer is -157/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-18/32 2/21-36/32 2/42-18/32 2/21-18/64 6/21-18/32 2/21-54/32 2/63-18/32 2/21-18/96 10/21-18/32 2/21-90/32 14/21-18/32