Subtract 80/7 from 42/5
1st number: 8 2/5, 2nd number: 11 3/7
42/5 - 80/7 is -106/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
42/5 = 42 × 7/5 × 7 = 294/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
80/7 = 80 × 5/7 × 5 = 400/35 - Subtract the two like fractions:
294/35 - 400/35 = 294 - 400/35 = -106/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-80/7 42/10-80/7 42/5-80/14 42/15-80/7 42/5-80/21 42/25-80/7 42/5-80/35 42/35-80/7 42/5-80/49