Subtract 16/7 from 27/21
1st number: 1 6/21, 2nd number: 2 2/7
27/21 - 16/7 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
27/21 = 27 × 1/21 × 1 = 27/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
16/7 = 16 × 3/7 × 3 = 48/21 - Subtract the two like fractions:
27/21 - 48/21 = 27 - 48/21 = -21/21 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-16/7 27/21-32/7 27/42-16/7 27/21-16/14 81/21-16/7 27/21-48/7 27/63-16/7 27/21-16/21 27/21-80/7 27/21-16/35 27/21-16/49