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