Subtract 7/20 from 1/36
1/36 - 7/20 is -29/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
1/36 = 1 × 5/36 × 5 = 5/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Subtract the two like fractions:
5/180 - 63/180 = 5 - 63/180 = -58/180 - After reducing the fraction, the answer is -29/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/36-7/20 1/36-14/20 1/72-7/20 1/36-7/40 3/36-7/20 1/36-21/20 1/36-7/60 5/36-7/20 1/36-35/20 7/36-7/20 1/36-49/20