Subtract 16/9 from 21/49
1st number: 21/49, 2nd number: 1 7/9
21/49 - 16/9 is -85/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 9 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 49 × 9 = 441,
21/49 = 21 × 9/49 × 9 = 189/441 - Likewise, for the 2nd fraction, since 9 × 49 = 441,
16/9 = 16 × 49/9 × 49 = 784/441 - Subtract the two like fractions:
189/441 - 784/441 = 189 - 784/441 = -595/441 - After reducing the fraction, the answer is -85/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-16/9 21/49-32/9 21/98-16/9 21/49-16/18 63/49-16/9 21/49-48/9 21/49-16/27 21/49-80/9 21/49-16/45 21/49-16/63