Subtract 5/70 from 21/49
21/49 - 5/70 is 5/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 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 70 × 7 = 490,
5/70 = 5 × 7/70 × 7 = 35/490 - Subtract the two like fractions:
210/490 - 35/490 = 210 - 35/490 = 175/490 - After reducing the fraction, the answer is 5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-5/70 21/49-10/70 21/98-5/70 63/49-5/70 21/49-15/70 21/49-25/70 21/49-35/70