Subtract 28/84 from 7/2
1st number: 3 1/2, 2nd number: 28/84
7/2 - 28/84 is 19/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 2 × 42 = 84,
7/2 = 7 × 42/2 × 42 = 294/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
28/84 = 28 × 1/84 × 1 = 28/84 - Subtract the two like fractions:
294/84 - 28/84 = 294 - 28/84 = 266/84 - After reducing the fraction, the answer is 19/6
- In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/2-28/84 7/2-56/84 7/4-28/84 21/2-28/84 7/6-28/84 35/2-28/84 7/10-28/84 49/2-28/84 7/14-28/84