Subtract 30/84 from 5/18
5/18 - 30/84 is -5/63.
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,
5/18 = 5 × 14/18 × 14 = 70/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
30/84 = 30 × 3/84 × 3 = 90/252 - Subtract the two like fractions:
70/252 - 90/252 = 70 - 90/252 = -20/252 - After reducing the fraction, the answer is -5/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-30/84 5/18-60/84 5/36-30/84 15/18-30/84 5/18-90/84 5/54-30/84 25/18-30/84 5/90-30/84 35/18-30/84