Subtract 1/27 from 75/21
1st number: 3 12/21, 2nd number: 1/27
75/21 - 1/27 is 668/189.
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,
75/21 = 75 × 9/21 × 9 = 675/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
1/27 = 1 × 7/27 × 7 = 7/189 - Subtract the two like fractions:
675/189 - 7/189 = 675 - 7/189 = 668/189 - In mixed form: 3101/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-2/27 75/42-1/27 75/21-1/54 75/21-3/27 75/63-1/27 75/21-1/81 75/21-5/27 75/21-7/27