Subtract 54/12 from 18/30
1st number: 18/30, 2nd number: 4 6/12
18/30 - 54/12 is -39/10.
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,
18/30 = 18 × 2/30 × 2 = 36/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
54/12 = 54 × 5/12 × 5 = 270/60 - Subtract the two like fractions:
36/60 - 270/60 = 36 - 270/60 = -234/60 - After reducing the fraction, the answer is -39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-54/12 18/60-54/12 18/30-54/24 54/30-54/12 18/90-54/12 18/30-54/36 90/30-54/12 18/30-54/60 18/30-54/84