Subtract 20/49 from 5/40
5/40 - 20/49 is -111/392.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
5/40 = 5 × 49/40 × 49 = 245/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
20/49 = 20 × 40/49 × 40 = 800/1960 - Subtract the two like fractions:
245/1960 - 800/1960 = 245 - 800/1960 = -555/1960 - After reducing the fraction, the answer is -111/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/40-20/49 5/40-40/49 5/80-20/49 5/40-20/98 15/40-20/49 5/40-60/49 25/40-20/49 35/40-20/49