Subtract 18/20 from 5/49
5/49 - 18/20 is -391/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 20 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 49 × 20 = 980,
5/49 = 5 × 20/49 × 20 = 100/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
18/20 = 18 × 49/20 × 49 = 882/980 - Subtract the two like fractions:
100/980 - 882/980 = 100 - 882/980 = -782/980 - After reducing the fraction, the answer is -391/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/49-18/20 5/49-36/20 5/98-18/20 5/49-18/40 15/49-18/20 5/49-54/20 5/49-18/60 25/49-18/20 5/49-90/20 35/49-18/20