Subtract 98/81 from 4/8
1st number: 4/8, 2nd number: 1 17/81
4/8 - 98/81 is -115/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
4/8 = 4 × 81/8 × 81 = 324/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
98/81 = 98 × 8/81 × 8 = 784/648 - Subtract the two like fractions:
324/648 - 784/648 = 324 - 784/648 = -460/648 - After reducing the fraction, the answer is -115/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/16-98/81 12/8-98/81 4/24-98/81 20/8-98/81 4/40-98/81 28/8-98/81 4/56-98/81