Subtract 20/7 from 42/60
1st number: 42/60, 2nd number: 2 6/7
42/60 - 20/7 is -151/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
42/60 = 42 × 7/60 × 7 = 294/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
20/7 = 20 × 60/7 × 60 = 1200/420 - Subtract the two like fractions:
294/420 - 1200/420 = 294 - 1200/420 = -906/420 - After reducing the fraction, the answer is -151/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60-20/7 42/60-40/7 42/60-20/14 42/60-60/7 42/60-20/21 42/60-20/35 42/60-20/49