Subtract 20/63 from 7/49
7/49 - 20/63 is -11/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 63 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
7/49 = 7 × 9/49 × 9 = 63/441 - Likewise, for the 2nd fraction, since 63 × 7 = 441,
20/63 = 20 × 7/63 × 7 = 140/441 - Subtract the two like fractions:
63/441 - 140/441 = 63 - 140/441 = -77/441 - After reducing the fraction, the answer is -11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/49-20/63 7/49-40/63 7/98-20/63 21/49-20/63 7/49-60/63 35/49-20/63