Subtract 1/27 from 42/84
42/84 - 1/27 is 25/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
42/84 = 42 × 9/84 × 9 = 378/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
1/27 = 1 × 28/27 × 28 = 28/756 - Subtract the two like fractions:
378/756 - 28/756 = 378 - 28/756 = 350/756 - After reducing the fraction, the answer is 25/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-2/27 42/84-1/54 42/84-3/27 42/84-1/81 42/84-5/27 42/84-7/27