Subtract 30/16 from 16/21
1st number: 16/21, 2nd number: 1 14/16
16/21 - 30/16 is -187/168.
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,
16/21 = 16 × 16/21 × 16 = 256/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
30/16 = 30 × 21/16 × 21 = 630/336 - Subtract the two like fractions:
256/336 - 630/336 = 256 - 630/336 = -374/336 - After reducing the fraction, the answer is -187/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21-30/16 16/21-60/16 16/42-30/16 16/21-30/32 48/21-30/16 16/21-90/16 16/63-30/16 16/21-30/48 80/21-30/16 16/21-30/80