Subtract 3/9 from 7/84
7/84 - 3/9 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
7/84 = 7 × 3/84 × 3 = 21/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
3/9 = 3 × 28/9 × 28 = 84/252 - Subtract the two like fractions:
21/252 - 84/252 = 21 - 84/252 = -63/252 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-3/9 7/84-6/9 7/84-3/18 21/84-3/9 7/84-3/27 35/84-3/9 7/84-15/9 7/84-3/45 49/84-3/9 7/84-21/9 7/84-3/63