Subtract 20/3 from 7/84
1st number: 7/84, 2nd number: 6 2/3
7/84 - 20/3 is -79/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 3 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Likewise, for the 2nd fraction, since 3 × 28 = 84,
20/3 = 20 × 28/3 × 28 = 560/84 - Subtract the two like fractions:
7/84 - 560/84 = 7 - 560/84 = -553/84 - After reducing the fraction, the answer is -79/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-20/3 7/84-40/3 7/84-20/6 21/84-20/3 7/84-60/3 7/84-20/9 35/84-20/3 7/84-20/15 49/84-20/3 7/84-20/21