Subtract 84/12 from 28/20
1st number: 1 8/20, 2nd number: 7 0/12
28/20 - 84/12 is -28/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
84/12 = 84 × 5/12 × 5 = 420/60 - Subtract the two like fractions:
84/60 - 420/60 = 84 - 420/60 = -336/60 - After reducing the fraction, the answer is -28/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20-84/12 28/40-84/12 28/20-84/24 84/20-84/12 28/60-84/12 28/20-84/36 28/20-84/60