Answers

Subtract 25/20 from 90/98

1^st number: 90/98, 2^nd number: 1 5/20

90/98 - 25/20 is -65/196.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 20 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 98 × 10 = 980,
   90/98 = 90 × 10/98 × 10 = 900/980
3. Likewise, for the 2nd fraction, since 20 × 49 = 980,
   25/20 = 25 × 49/20 × 49 = 1225/980
4. Subtract the two like fractions:
   900/980 - 1225/980 = 900 - 1225/980 = -325/980
5. After reducing the fraction, the answer is -65/196

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁹⁰/₉₈-⁵⁰/₂₀ ⁹⁰/₉₈-²⁵/₄₀ ⁹⁰/₉₈-⁷⁵/₂₀ ⁹⁰/₉₈-²⁵/₆₀

Subtract Fractions Calculator