Subtract 8/70 from 20/49
20/49 - 8/70 is 72/245.
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,
20/49 = 20 × 10/49 × 10 = 200/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
8/70 = 8 × 7/70 × 7 = 56/490 - Subtract the two like fractions:
200/490 - 56/490 = 200 - 56/490 = 144/490 - After reducing the fraction, the answer is 72/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49-8/70 20/49-16/70 20/98-8/70 60/49-8/70 20/49-24/70 20/49-40/70 20/49-56/70