Subtract 81/42 from 24/8
1st number: 3 0/8, 2nd number: 1 39/42
24/8 - 81/42 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
24/8 = 24 × 21/8 × 21 = 504/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
81/42 = 81 × 4/42 × 4 = 324/168 - Subtract the two like fractions:
504/168 - 324/168 = 504 - 324/168 = 180/168 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/8-81/42 24/16-81/42 24/8-81/84 72/8-81/42 24/40-81/42 24/56-81/42