Subtract 54/15 from 1/8
1st number: 1/8, 2nd number: 3 9/15
1/8 - 54/15 is -139/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
1/8 = 1 × 15/8 × 15 = 15/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
54/15 = 54 × 8/15 × 8 = 432/120 - Subtract the two like fractions:
15/120 - 432/120 = 15 - 432/120 = -417/120 - After reducing the fraction, the answer is -139/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/8-54/15 1/16-54/15 1/8-54/30 3/8-54/15 1/24-54/15 1/8-54/45 5/8-54/15 1/40-54/15 1/8-54/75 7/8-54/15 1/56-54/15