Subtract 48/12 from 42/30
1st number: 1 12/30, 2nd number: 4 0/12
42/30 - 48/12 is -13/5.
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,
42/30 = 42 × 2/30 × 2 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
48/12 = 48 × 5/12 × 5 = 240/60 - Subtract the two like fractions:
84/60 - 240/60 = 84 - 240/60 = -156/60 - After reducing the fraction, the answer is -13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-48/12 42/30-96/12 42/60-48/12 42/30-48/24 42/90-48/12 42/30-48/36 42/30-48/60 42/30-48/84