Subtract 27/24 from 12/42
1st number: 12/42, 2nd number: 1 3/24
12/42 - 27/24 is -47/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
12/42 = 12 × 4/42 × 4 = 48/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
27/24 = 27 × 7/24 × 7 = 189/168 - Subtract the two like fractions:
48/168 - 189/168 = 48 - 189/168 = -141/168 - After reducing the fraction, the answer is -47/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-27/24 12/42-54/24 12/84-27/24 12/42-27/48 36/42-27/24 12/42-81/24 12/42-27/72 60/42-27/24 84/42-27/24