Subtract 75/70 from 45/98
1st number: 45/98, 2nd number: 1 5/70
45/98 - 75/70 is -30/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
45/98 = 45 × 5/98 × 5 = 225/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
75/70 = 75 × 7/70 × 7 = 525/490 - Subtract the two like fractions:
225/490 - 525/490 = 225 - 525/490 = -300/490 - After reducing the fraction, the answer is -30/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/98-75/70