Subtract 2/21 from 4/42
4/42 - 2/21 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
4/42 = 4 × 1/42 × 1 = 4/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
2/21 = 2 × 2/21 × 2 = 4/42 - Subtract the two like fractions:
4/42 - 4/42 = 4 - 4/42 = 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: 8/42-2/21 4/42-4/21 4/84-2/21 4/42-2/42 12/42-2/21 4/42-6/21 4/42-2/63 20/42-2/21 4/42-10/21 28/42-2/21 4/42-14/21