Subtract 56/36 from 45/30
1st number: 1 15/30, 2nd number: 1 20/36
45/30 - 56/36 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
45/30 = 45 × 6/30 × 6 = 270/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
56/36 = 56 × 5/36 × 5 = 280/180 - Subtract the two like fractions:
270/180 - 280/180 = 270 - 280/180 = -10/180 - After reducing the fraction, the answer is -1/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-56/36 45/60-56/36 45/30-56/72 45/90-56/36