Subtract 84/9 from 12/20
1st number: 12/20, 2nd number: 9 3/9
12/20 - 84/9 is -131/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
84/9 = 84 × 20/9 × 20 = 1680/180 - Subtract the two like fractions:
108/180 - 1680/180 = 108 - 1680/180 = -1572/180 - After reducing the fraction, the answer is -131/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-84/9 12/40-84/9 12/20-84/18 36/20-84/9 12/60-84/9 12/20-84/27 60/20-84/9 12/20-84/45 84/20-84/9 12/20-84/63