Subtract 70/98 from 3/20
3/20 - 70/98 is -79/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 98 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
3/20 = 3 × 49/20 × 49 = 147/980 - Likewise, for the 2nd fraction, since 98 × 10 = 980,
70/98 = 70 × 10/98 × 10 = 700/980 - Subtract the two like fractions:
147/980 - 700/980 = 147 - 700/980 = -553/980 - After reducing the fraction, the answer is -79/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-70/98 3/40-70/98 9/20-70/98 3/60-70/98 15/20-70/98 21/20-70/98