Subtract 84/7 from 10/42
1st number: 10/42, 2nd number: 12 0/7
10/42 - 84/7 is -247/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
10/42 = 10 × 1/42 × 1 = 10/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
84/7 = 84 × 6/7 × 6 = 504/42 - Subtract the two like fractions:
10/42 - 504/42 = 10 - 504/42 = -494/42 - After reducing the fraction, the answer is -247/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42-84/7 10/84-84/7 10/42-84/14 30/42-84/7 10/42-84/21 50/42-84/7 10/42-84/35 70/42-84/7 10/42-84/49