Subtract 45/56 from 42/98
42/98 - 45/56 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 56 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 98 × 4 = 392,
42/98 = 42 × 4/98 × 4 = 168/392 - Likewise, for the 2nd fraction, since 56 × 7 = 392,
45/56 = 45 × 7/56 × 7 = 315/392 - Subtract the two like fractions:
168/392 - 315/392 = 168 - 315/392 = -147/392 - After reducing the fraction, the answer is -3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98-45/56 42/98-90/56