Subtract 15/90 from 3/98
3/98 - 15/90 is -20/147.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 98 × 45 = 4410,
3/98 = 3 × 45/98 × 45 = 135/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
15/90 = 15 × 49/90 × 49 = 735/4410 - Subtract the two like fractions:
135/4410 - 735/4410 = 135 - 735/4410 = -600/4410 - After reducing the fraction, the answer is -20/147
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/98-15/90 3/98-30/90 9/98-15/90 3/98-45/90 15/98-15/90 3/98-75/90 21/98-15/90