Subtract 3/7 from 18/84
18/84 - 3/7 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
18/84 = 18 × 1/84 × 1 = 18/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
3/7 = 3 × 12/7 × 12 = 36/84 - Subtract the two like fractions:
18/84 - 36/84 = 18 - 36/84 = -18/84 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84-3/7 18/84-6/7 18/84-3/14 54/84-3/7 18/84-9/7 18/84-3/21 90/84-3/7 18/84-15/7 18/84-3/35 18/84-21/7 18/84-3/49