Subtract 9/21 from 6/16
6/16 - 9/21 is -3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
6/16 = 6 × 21/16 × 21 = 126/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
9/21 = 9 × 16/21 × 16 = 144/336 - Subtract the two like fractions:
126/336 - 144/336 = 126 - 144/336 = -18/336 - After reducing the fraction, the answer is -3/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/16-9/21 6/16-18/21 6/32-9/21 6/16-9/42 18/16-9/21 6/16-27/21 6/48-9/21 6/16-9/63 30/16-9/21 6/16-45/21 6/80-9/21 42/16-9/21 6/16-63/21