Subtract 20/7 from 42/25
1st number: 1 17/25, 2nd number: 2 6/7
42/25 - 20/7 is -206/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 7 is 175
Next, find the equivalent fraction of both fractional numbers with denominator 175 - For the 1st fraction, since 25 × 7 = 175,
42/25 = 42 × 7/25 × 7 = 294/175 - Likewise, for the 2nd fraction, since 7 × 25 = 175,
20/7 = 20 × 25/7 × 25 = 500/175 - Subtract the two like fractions:
294/175 - 500/175 = 294 - 500/175 = -206/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-20/7 42/25-40/7 42/50-20/7 42/25-20/14 42/25-60/7 42/75-20/7 42/25-20/21 42/25-20/35 42/25-20/49