Subtract 3/12 from 28/84
28/84 - 3/12 is 1/12.
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,
28/84 = 28 × 1/84 × 1 = 28/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84 - Subtract the two like fractions:
28/84 - 21/84 = 28 - 21/84 = 7/84 - After reducing the fraction, the answer is 1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84-3/12 28/84-6/12 28/84-3/24 28/84-9/12 28/84-3/36 28/84-15/12 28/84-3/60 28/84-21/12 28/84-3/84