Subtract 12/9 from 9/20
1st number: 9/20, 2nd number: 1 3/9
9/20 - 12/9 is -53/60.
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,
9/20 = 9 × 9/20 × 9 = 81/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Subtract the two like fractions:
81/180 - 240/180 = 81 - 240/180 = -159/180 - After reducing the fraction, the answer is -53/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-12/9 9/20-24/9 9/40-12/9 9/20-12/18 27/20-12/9 9/20-36/9 9/60-12/9 9/20-12/27 45/20-12/9 9/20-60/9 9/20-12/45 63/20-12/9 9/20-84/9 9/20-12/63