Subtract 50/49 from 20/70
1st number: 20/70, 2nd number: 1 1/49
20/70 - 50/49 is -36/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
20/70 = 20 × 7/70 × 7 = 140/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
50/49 = 50 × 10/49 × 10 = 500/490 - Subtract the two like fractions:
140/490 - 500/490 = 140 - 500/490 = -360/490 - After reducing the fraction, the answer is -36/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-50/49 20/70-50/98 60/70-50/49