Subtract 8/28 from 42/84
42/84 - 8/28 is 3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
8/28 = 8 × 3/28 × 3 = 24/84 - Subtract the two like fractions:
42/84 - 24/84 = 42 - 24/84 = 18/84 - After reducing the fraction, the answer is 3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-16/28 42/84-8/56 42/84-24/28 42/84-8/84 42/84-40/28 42/84-56/28