Subtract 3/18 from 1/72
1/72 - 3/18 is -11/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
1/72 = 1 × 1/72 × 1 = 1/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
3/18 = 3 × 4/18 × 4 = 12/72 - Subtract the two like fractions:
1/72 - 12/72 = 1 - 12/72 = -11/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/72-3/18 1/72-6/18 1/72-3/36 3/72-3/18 1/72-9/18 1/72-3/54 5/72-3/18 1/72-15/18 1/72-3/90 7/72-3/18 1/72-21/18