Subtract 56/45 from 27/42
1st number: 27/42, 2nd number: 1 11/45
27/42 - 56/45 is -379/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
27/42 = 27 × 15/42 × 15 = 405/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
56/45 = 56 × 14/45 × 14 = 784/630 - Subtract the two like fractions:
405/630 - 784/630 = 405 - 784/630 = -379/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-56/45 27/84-56/45 27/42-56/90 81/42-56/45