Subtract 30/15 from 45/56
1st number: 45/56, 2nd number: 2 0/15
45/56 - 30/15 is -67/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 15 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
45/56 = 45 × 15/56 × 15 = 675/840 - Likewise, for the 2nd fraction, since 15 × 56 = 840,
30/15 = 30 × 56/15 × 56 = 1680/840 - Subtract the two like fractions:
675/840 - 1680/840 = 675 - 1680/840 = -1005/840 - After reducing the fraction, the answer is -67/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56-30/15 45/56-60/15 45/56-90/15 45/56-30/45 45/56-30/75