Subtract 72/18 from 1/8
1st number: 1/8, 2nd number: 4 0/18
1/8 - 72/18 is -31/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
1/8 = 1 × 9/8 × 9 = 9/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
72/18 = 72 × 4/18 × 4 = 288/72 - Subtract the two like fractions:
9/72 - 288/72 = 9 - 288/72 = -279/72 - After reducing the fraction, the answer is -31/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/8-72/18 1/16-72/18 1/8-72/36 3/8-72/18 1/24-72/18 1/8-72/54 5/8-72/18 1/40-72/18 1/8-72/90 7/8-72/18 1/56-72/18