Subtract 42/24 from 8/81
1st number: 8/81, 2nd number: 1 18/24
8/81 - 42/24 is -535/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 24 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
8/81 = 8 × 8/81 × 8 = 64/648 - Likewise, for the 2nd fraction, since 24 × 27 = 648,
42/24 = 42 × 27/24 × 27 = 1134/648 - Subtract the two like fractions:
64/648 - 1134/648 = 64 - 1134/648 = -1070/648 - After reducing the fraction, the answer is -535/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/81-42/24 8/81-84/24 8/81-42/48 24/81-42/24 8/81-42/72 40/81-42/24 56/81-42/24