Subtract 80/27 from 45/21
1st number: 2 3/21, 2nd number: 2 26/27
45/21 - 80/27 is -155/189.
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,
45/21 = 45 × 9/21 × 9 = 405/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
80/27 = 80 × 7/27 × 7 = 560/189 - Subtract the two like fractions:
405/189 - 560/189 = 405 - 560/189 = -155/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-80/27 45/42-80/27 45/21-80/54 45/63-80/27 45/21-80/81