Subtract 30/18 from 6/84
1st number: 6/84, 2nd number: 1 12/18
6/84 - 30/18 is -67/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
6/84 = 6 × 3/84 × 3 = 18/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
30/18 = 30 × 14/18 × 14 = 420/252 - Subtract the two like fractions:
18/252 - 420/252 = 18 - 420/252 = -402/252 - After reducing the fraction, the answer is -67/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/84-30/18 6/84-60/18 6/84-30/36 18/84-30/18 6/84-90/18 6/84-30/54 30/84-30/18 6/84-30/90 42/84-30/18