Subtract 42/49 from 9/84
9/84 - 42/49 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 49 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 84 × 7 = 588,
9/84 = 9 × 7/84 × 7 = 63/588 - Likewise, for the 2nd fraction, since 49 × 12 = 588,
42/49 = 42 × 12/49 × 12 = 504/588 - Subtract the two like fractions:
63/588 - 504/588 = 63 - 504/588 = -441/588 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84-42/49 9/84-84/49 9/84-42/98 27/84-42/49 45/84-42/49 63/84-42/49