Subtract 20/36 from 12/20
12/20 - 20/36 is 2/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 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 36 × 5 = 180,
20/36 = 20 × 5/36 × 5 = 100/180 - Subtract the two like fractions:
108/180 - 100/180 = 108 - 100/180 = 8/180 - After reducing the fraction, the answer is 2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-20/36 12/20-40/36 12/40-20/36 12/20-20/72 36/20-20/36 12/20-60/36 12/60-20/36 60/20-20/36 84/20-20/36