Subtract 10/18 from 4/72
4/72 - 10/18 is -1/2.
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,
4/72 = 4 × 1/72 × 1 = 4/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
10/18 = 10 × 4/18 × 4 = 40/72 - Subtract the two like fractions:
4/72 - 40/72 = 4 - 40/72 = -36/72 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72-10/18 4/72-20/18 4/72-10/36 12/72-10/18 4/72-30/18 4/72-10/54 20/72-10/18 4/72-50/18 4/72-10/90 28/72-10/18 4/72-70/18