Subtract 25/27 from 5/21
5/21 - 25/27 is -130/189.
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,
5/21 = 5 × 9/21 × 9 = 45/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
25/27 = 25 × 7/27 × 7 = 175/189 - Subtract the two like fractions:
45/189 - 175/189 = 45 - 175/189 = -130/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-25/27 5/21-50/27 5/42-25/27 5/21-25/54 15/21-25/27 5/21-75/27 5/63-25/27 5/21-25/81 25/21-25/27 35/21-25/27