Subtract 9/21 from 2/16
2/16 - 9/21 is -17/56.
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,
2/16 = 2 × 21/16 × 21 = 42/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
9/21 = 9 × 16/21 × 16 = 144/336 - Subtract the two like fractions:
42/336 - 144/336 = 42 - 144/336 = -102/336 - After reducing the fraction, the answer is -17/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/16-9/21 2/16-18/21 2/32-9/21 2/16-9/42 6/16-9/21 2/16-27/21 2/48-9/21 2/16-9/63 10/16-9/21 2/16-45/21 2/80-9/21 14/16-9/21 2/16-63/21