Subtract 5/10 from 21/49
21/49 - 5/10 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 10 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
21/49 = 21 × 10/49 × 10 = 210/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
5/10 = 5 × 49/10 × 49 = 245/490 - Subtract the two like fractions:
210/490 - 245/490 = 210 - 245/490 = -35/490 - After reducing the fraction, the answer is -1/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-5/10 21/98-5/10 21/49-5/20 63/49-5/10 21/49-15/10 21/49-5/30 21/49-25/10 21/49-5/50 21/49-35/10 21/49-5/70