Subtract 27/42 from 49/63
49/63 - 27/42 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,
49/63 = 49 × 2/63 × 2 = 98/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
27/42 = 27 × 3/42 × 3 = 81/126 - Subtract the two like fractions:
98/126 - 81/126 = 98 - 81/126 = 17/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/63-27/42 49/63-54/42 49/63-27/84 49/63-81/42