Answers

Subtract 21/81 from 5/98

5/98 - 21/81 is -551/2646.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 81 is 7938
   
   Next, find the equivalent fraction of both fractional numbers with denominator 7938
2. For the 1st fraction, since 98 × 81 = 7938,
   5/98 = 5 × 81/98 × 81 = 405/7938
3. Likewise, for the 2nd fraction, since 81 × 98 = 7938,
   21/81 = 21 × 98/81 × 98 = 2058/7938
4. Subtract the two like fractions:
   405/7938 - 2058/7938 = 405 - 2058/7938 = -1653/7938
5. After reducing the fraction, the answer is -551/2646

MathStep (Works offline)

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

Related: ¹⁰/₉₈-²¹/₈₁ ⁵/₉₈-⁴²/₈₁ ¹⁵/₉₈-²¹/₈₁ ⁵/₉₈-⁶³/₈₁ ²⁵/₉₈-²¹/₈₁ ³⁵/₉₈-²¹/₈₁

Subtract Fractions Calculator