Subtract 27/32 from 7/21
7/21 - 27/32 is -49/96.
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,
7/21 = 7 × 32/21 × 32 = 224/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
27/32 = 27 × 21/32 × 21 = 567/672 - Subtract the two like fractions:
224/672 - 567/672 = 224 - 567/672 = -343/672 - After reducing the fraction, the answer is -49/96
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-27/32 7/21-54/32 7/42-27/32 7/21-27/64 7/21-81/32 7/63-27/32 7/21-27/96 35/21-27/32 49/21-27/32