Subtract 7/81 from 12/98
12/98 - 7/81 is 143/3969.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 81 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 98 × 81 = 7938,
12/98 = 12 × 81/98 × 81 = 972/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
7/81 = 7 × 98/81 × 98 = 686/7938 - Subtract the two like fractions:
972/7938 - 686/7938 = 972 - 686/7938 = 286/7938 - After reducing the fraction, the answer is 143/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/98-7/81 12/98-14/81 36/98-7/81 12/98-21/81 60/98-7/81 12/98-35/81 84/98-7/81 12/98-49/81