Subtract 2/27 from 90/21
1st number: 4 6/21, 2nd number: 2/27
90/21 - 2/27 is 796/189.
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,
90/21 = 90 × 9/21 × 9 = 810/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
2/27 = 2 × 7/27 × 7 = 14/189 - Subtract the two like fractions:
810/189 - 14/189 = 810 - 14/189 = 796/189 - In mixed form: 440/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-4/27 90/42-2/27 90/21-2/54 90/21-6/27 90/63-2/27 90/21-2/81 90/21-10/27 90/21-14/27