Subtract 24/49 from 7/20
7/20 - 24/49 is -137/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
7/20 = 7 × 49/20 × 49 = 343/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
24/49 = 24 × 20/49 × 20 = 480/980 - Subtract the two like fractions:
343/980 - 480/980 = 343 - 480/980 = -137/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-24/49 7/20-48/49 7/40-24/49 7/20-24/98 21/20-24/49 7/20-72/49 7/60-24/49 35/20-24/49 49/20-24/49