Subtract 42/8 from 10/15
1st number: 10/15, 2nd number: 5 2/8
10/15 - 42/8 is -55/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
10/15 = 10 × 8/15 × 8 = 80/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
42/8 = 42 × 15/8 × 15 = 630/120 - Subtract the two like fractions:
80/120 - 630/120 = 80 - 630/120 = -550/120 - After reducing the fraction, the answer is -55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15-42/8 10/15-84/8 10/30-42/8 10/15-42/16 30/15-42/8 10/45-42/8 10/15-42/24 50/15-42/8 10/75-42/8 10/15-42/40 70/15-42/8 10/15-42/56