Subtract 15/36 from 3/20
3/20 - 15/36 is -4/15.
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,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
15/36 = 15 × 5/36 × 5 = 75/180 - Subtract the two like fractions:
27/180 - 75/180 = 27 - 75/180 = -48/180 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-15/36 3/20-30/36 3/40-15/36 3/20-15/72 9/20-15/36 3/20-45/36 3/60-15/36 15/20-15/36 3/20-75/36 21/20-15/36