Subtract 12/42 from 6/21
6/21 - 12/42 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
6/21 = 6 × 2/21 × 2 = 12/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Subtract the two like fractions:
12/42 - 12/42 = 12 - 12/42 = 0/42 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-12/42 6/21-24/42 6/42-12/42 6/21-12/84 18/21-12/42 6/21-36/42 6/63-12/42 30/21-12/42 6/21-60/42 42/21-12/42 6/21-84/42