Answers

Subtract 45/98 from 90/20

1^st number: 4 10/20, 2^nd number: 45/98

90/20 - 45/98 is 198/49.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 98 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   90/20 = 90 × 49/20 × 49 = 4410/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   45/98 = 45 × 10/98 × 10 = 450/980
4. Subtract the two like fractions:
   4410/980 - 450/980 = 4410 - 450/980 = 3960/980
5. After reducing the fraction, the answer is 198/49
6. In mixed form: 42/49

MathStep (Works offline)

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

Related: ⁹⁰/₂₀-⁹⁰/₉₈ ⁹⁰/₄₀-⁴⁵/₉₈ ⁹⁰/₆₀-⁴⁵/₉₈

Subtract Fractions Calculator