Subtract 90/8 from 2/81
1st number: 2/81, 2nd number: 11 2/8
2/81 - 90/8 is -3637/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 8 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
2/81 = 2 × 8/81 × 8 = 16/648 - Likewise, for the 2nd fraction, since 8 × 81 = 648,
90/8 = 90 × 81/8 × 81 = 7290/648 - Subtract the two like fractions:
16/648 - 7290/648 = 16 - 7290/648 = -7274/648 - After reducing the fraction, the answer is -3637/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/81-90/8 2/81-90/16 6/81-90/8 2/81-90/24 10/81-90/8 2/81-90/40 14/81-90/8 2/81-90/56