Subtract 45/20 from 27/15
1st number: 1 12/15, 2nd number: 2 5/20
27/15 - 45/20 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
27/15 = 27 × 4/15 × 4 = 108/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Subtract the two like fractions:
108/60 - 135/60 = 108 - 135/60 = -27/60 - After reducing the fraction, the answer is -9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15-45/20 27/15-90/20 27/30-45/20 27/15-45/40 81/15-45/20 27/45-45/20 27/15-45/60 27/75-45/20