Subtract 45/98 from 54/70
54/70 - 45/98 is 153/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
54/70 = 54 × 7/70 × 7 = 378/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
45/98 = 45 × 5/98 × 5 = 225/490 - Subtract the two like fractions:
378/490 - 225/490 = 378 - 225/490 = 153/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/70-90/98