Subtract 6/4 from 18/84
1st number: 18/84, 2nd number: 1 2/4
18/84 - 6/4 is -9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 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 4 × 21 = 84,
6/4 = 6 × 21/4 × 21 = 126/84 - Subtract the two like fractions:
18/84 - 126/84 = 18 - 126/84 = -108/84 - After reducing the fraction, the answer is -9/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84-6/4 18/84-12/4 18/84-6/8 54/84-6/4 18/84-18/4 18/84-6/12 90/84-6/4 18/84-30/4 18/84-6/20 18/84-42/4 18/84-6/28