Subtract 40/98 from 10/81
10/81 - 40/98 is -1130/3969.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 98 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 81 × 98 = 7938,
10/81 = 10 × 98/81 × 98 = 980/7938 - Likewise, for the 2nd fraction, since 98 × 81 = 7938,
40/98 = 40 × 81/98 × 81 = 3240/7938 - Subtract the two like fractions:
980/7938 - 3240/7938 = 980 - 3240/7938 = -2260/7938 - After reducing the fraction, the answer is -1130/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/81-40/98 10/81-80/98 30/81-40/98 50/81-40/98 70/81-40/98