Subtract 42/20 from 28/12
1st number: 2 4/12, 2nd number: 2 2/20
28/12 - 42/20 is 7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
28/12 = 28 × 5/12 × 5 = 140/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Subtract the two like fractions:
140/60 - 126/60 = 140 - 126/60 = 14/60 - After reducing the fraction, the answer is 7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-42/20 28/12-84/20 28/24-42/20 28/12-42/40 84/12-42/20 28/36-42/20 28/12-42/60 28/60-42/20 28/84-42/20