Subtract 15/42 from 10/27
10/27 - 15/42 is 5/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
10/27 = 10 × 14/27 × 14 = 140/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
15/42 = 15 × 9/42 × 9 = 135/378 - Subtract the two like fractions:
140/378 - 135/378 = 140 - 135/378 = 5/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/27-15/42 10/27-30/42 10/54-15/42 10/27-15/84 30/27-15/42 10/27-45/42 10/81-15/42 50/27-15/42 10/27-75/42 70/27-15/42