Subtract 18/10 from 20/49
1st number: 20/49, 2nd number: 1 8/10
20/49 - 18/10 is -341/245.
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,
20/49 = 20 × 10/49 × 10 = 200/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
18/10 = 18 × 49/10 × 49 = 882/490 - Subtract the two like fractions:
200/490 - 882/490 = 200 - 882/490 = -682/490 - After reducing the fraction, the answer is -341/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49-18/10 20/49-36/10 20/98-18/10 20/49-18/20 60/49-18/10 20/49-54/10 20/49-18/30 20/49-90/10 20/49-18/50 20/49-18/70