Subtract 90/98 from 81/8
1st number: 10 1/8, 2nd number: 90/98
81/8 - 90/98 is 3609/392.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 98 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 8 × 49 = 392,
81/8 = 81 × 49/8 × 49 = 3969/392 - Likewise, for the 2nd fraction, since 98 × 4 = 392,
90/98 = 90 × 4/98 × 4 = 360/392 - Subtract the two like fractions:
3969/392 - 360/392 = 3969 - 360/392 = 3609/392 - In mixed form: 981/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/16-90/98 81/24-90/98 81/40-90/98 81/56-90/98