Subtract 20/40 from 4/98
4/98 - 20/40 is -45/98.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 98 × 20 = 1960,
4/98 = 4 × 20/98 × 20 = 80/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
20/40 = 20 × 49/40 × 49 = 980/1960 - Subtract the two like fractions:
80/1960 - 980/1960 = 80 - 980/1960 = -900/1960 - After reducing the fraction, the answer is -45/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/98-20/40 4/98-20/80 12/98-20/40 4/98-60/40 20/98-20/40 28/98-20/40