Subtract 20/84 from 2/18
2/18 - 20/84 is -8/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
2/18 = 2 × 14/18 × 14 = 28/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252 - Subtract the two like fractions:
28/252 - 60/252 = 28 - 60/252 = -32/252 - After reducing the fraction, the answer is -8/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18-20/84 2/18-40/84 2/36-20/84 6/18-20/84 2/18-60/84 2/54-20/84 10/18-20/84 2/90-20/84 14/18-20/84