Subtract 3/27 from 8/42
8/42 - 3/27 is 5/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
8/42 = 8 × 9/42 × 9 = 72/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
3/27 = 3 × 14/27 × 14 = 42/378 - Subtract the two like fractions:
72/378 - 42/378 = 72 - 42/378 = 30/378 - After reducing the fraction, the answer is 5/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-3/27 8/42-6/27 8/84-3/27 8/42-3/54 24/42-3/27 8/42-9/27 8/42-3/81 40/42-3/27 8/42-15/27 56/42-3/27 8/42-21/27