Subtract 9/16 from 3/21
3/21 - 9/16 is -47/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
3/21 = 3 × 16/21 × 16 = 48/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
9/16 = 9 × 21/16 × 21 = 189/336 - Subtract the two like fractions:
48/336 - 189/336 = 48 - 189/336 = -141/336 - After reducing the fraction, the answer is -47/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21-9/16 3/21-18/16 3/42-9/16 3/21-9/32 9/21-9/16 3/21-27/16 3/63-9/16 3/21-9/48 15/21-9/16 3/21-45/16 3/21-9/80 3/21-63/16