Subtract 21/12 from 6/84
1st number: 6/84, 2nd number: 1 9/12
6/84 - 21/12 is -47/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
6/84 = 6 × 1/84 × 1 = 6/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
21/12 = 21 × 7/12 × 7 = 147/84 - Subtract the two like fractions:
6/84 - 147/84 = 6 - 147/84 = -141/84 - After reducing the fraction, the answer is -47/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/84-21/12 6/84-42/12 6/84-21/24 18/84-21/12 6/84-63/12 6/84-21/36 30/84-21/12 6/84-21/60 42/84-21/12 6/84-21/84