Subtract 42/6 from 9/21
1st number: 9/21, 2nd number: 7 0/6
9/21 - 42/6 is -46/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
42/6 = 42 × 7/6 × 7 = 294/42 - Subtract the two like fractions:
18/42 - 294/42 = 18 - 294/42 = -276/42 - After reducing the fraction, the answer is -46/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21-42/6 9/21-84/6 9/42-42/6 9/21-42/12 27/21-42/6 9/63-42/6 9/21-42/18 45/21-42/6 9/21-42/30 63/21-42/6