Subtract 3/27 from 21/49
21/49 - 3/27 is 20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 27 is 1323
Next, find the equivalent fraction of both fractional numbers with denominator 1323 - For the 1st fraction, since 49 × 27 = 1323,
21/49 = 21 × 27/49 × 27 = 567/1323 - Likewise, for the 2nd fraction, since 27 × 49 = 1323,
3/27 = 3 × 49/27 × 49 = 147/1323 - Subtract the two like fractions:
567/1323 - 147/1323 = 567 - 147/1323 = 420/1323 - After reducing the fraction, the answer is 20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-3/27 21/49-6/27 21/98-3/27 21/49-3/54 63/49-3/27 21/49-9/27 21/49-3/81 21/49-15/27 21/49-21/27