Subtract 6/56 from 21/84
21/84 - 6/56 is 1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
6/56 = 6 × 3/56 × 3 = 18/168 - Subtract the two like fractions:
42/168 - 18/168 = 42 - 18/168 = 24/168 - After reducing the fraction, the answer is 1/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-6/56 21/84-12/56 63/84-6/56 21/84-18/56 21/84-30/56 21/84-42/56