Subtract 75/27 from 80/42
1st number: 1 38/42, 2nd number: 2 21/27
80/42 - 75/27 is -55/63.
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,
80/42 = 80 × 9/42 × 9 = 720/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
75/27 = 75 × 14/27 × 14 = 1050/378 - Subtract the two like fractions:
720/378 - 1050/378 = 720 - 1050/378 = -330/378 - After reducing the fraction, the answer is -55/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84-75/27 80/42-75/54 80/42-75/81