Answers

Subtract 80/63 from 20/9

1^st number: 2 2/9, 2^nd number: 1 17/63

20/9 - 80/63 is 20/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 63 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   20/9 = 20 × 7/9 × 7 = 140/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   80/63 = 80 × 1/63 × 1 = 80/63
4. Subtract the two like fractions:
   140/63 - 80/63 = 140 - 80/63 = 60/63
5. After reducing the fraction, the answer is 20/21

MathStep (Works offline)

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

Related: ⁴⁰/₉-⁸⁰/₆₃ ²⁰/₁₈-⁸⁰/₆₃ ⁶⁰/₉-⁸⁰/₆₃ ²⁰/₂₇-⁸⁰/₆₃ ²⁰/₄₅-⁸⁰/₆₃ ²⁰/₆₃-⁸⁰/₆₃

Subtract Fractions Calculator