Subtract 42/10 from 27/7
1st number: 3 6/7, 2nd number: 4 2/10
27/7 - 42/10 is -12/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
27/7 = 27 × 10/7 × 10 = 270/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
42/10 = 42 × 7/10 × 7 = 294/70 - Subtract the two like fractions:
270/70 - 294/70 = 270 - 294/70 = -24/70 - After reducing the fraction, the answer is -12/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/7-42/10 27/7-84/10 27/14-42/10 27/7-42/20 81/7-42/10 27/21-42/10 27/7-42/30 27/35-42/10 27/7-42/50 27/49-42/10 27/7-42/70