Answers

Subtract 9/49 from 81/20

1^st number: 4 1/20, 2^nd number: 9/49

81/20 - 9/49 is 3789/980.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 49 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   81/20 = 81 × 49/20 × 49 = 3969/980
3. Likewise, for the 2nd fraction, since 49 × 20 = 980,
   9/49 = 9 × 20/49 × 20 = 180/980
4. Subtract the two like fractions:
   3969/980 - 180/980 = 3969 - 180/980 = 3789/980
5. In mixed form: 3849/980

MathStep (Works offline)

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

Related: ⁸¹/₂₀-¹⁸/₄₉ ⁸¹/₄₀-⁹/₄₉ ⁸¹/₂₀-⁹/₉₈ ⁸¹/₂₀-²⁷/₄₉ ⁸¹/₆₀-⁹/₄₉ ⁸¹/₂₀-⁴⁵/₄₉ ⁸¹/₂₀-⁶³/₄₉

Subtract Fractions Calculator