Subtract 16/27 from 30/21
1st number: 1 9/21, 2nd number: 16/27
30/21 - 16/27 is 158/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
30/21 = 30 × 9/21 × 9 = 270/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
16/27 = 16 × 7/27 × 7 = 112/189 - Subtract the two like fractions:
270/189 - 112/189 = 270 - 112/189 = 158/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-16/27 30/21-32/27 30/42-16/27 30/21-16/54 90/21-16/27 30/21-48/27 30/63-16/27 30/21-16/81 30/21-80/27