Subtract 90/84 from 42/98
1st number: 42/98, 2nd number: 1 6/84
42/98 - 90/84 is -9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 84 is 588
Next, find the equivalent fraction of both fractional numbers with denominator 588 - For the 1st fraction, since 98 × 6 = 588,
42/98 = 42 × 6/98 × 6 = 252/588 - Likewise, for the 2nd fraction, since 84 × 7 = 588,
90/84 = 90 × 7/84 × 7 = 630/588 - Subtract the two like fractions:
252/588 - 630/588 = 252 - 630/588 = -378/588 - After reducing the fraction, the answer is -9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98-90/84