Subtract 7/42 from 2/63
2/63 - 7/42 is -17/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
2/63 = 2 × 2/63 × 2 = 4/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
7/42 = 7 × 3/42 × 3 = 21/126 - Subtract the two like fractions:
4/126 - 21/126 = 4 - 21/126 = -17/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/63-7/42 2/63-14/42 2/63-7/84 6/63-7/42 2/63-21/42 10/63-7/42 2/63-35/42 14/63-7/42 2/63-49/42