Subtract 27/12 from 45/30
1st number: 1 15/30, 2nd number: 2 3/12
45/30 - 27/12 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
45/30 = 45 × 2/30 × 2 = 90/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
27/12 = 27 × 5/12 × 5 = 135/60 - Subtract the two like fractions:
90/60 - 135/60 = 90 - 135/60 = -45/60 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-27/12 45/30-54/12 45/60-27/12 45/30-27/24 45/30-81/12 45/90-27/12 45/30-27/36 45/30-27/60 45/30-27/84