Answers

Subtract 90/63 from 8/45

1^st number: 8/45, 2^nd number: 1 27/63

8/45 - 90/63 is -394/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   8/45 = 8 × 7/45 × 7 = 56/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   90/63 = 90 × 5/63 × 5 = 450/315
4. Subtract the two like fractions:
   56/315 - 450/315 = 56 - 450/315 = -394/315

MathStep (Works offline)

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

Related: ¹⁶/₄₅-⁹⁰/₆₃ ⁸/₉₀-⁹⁰/₆₃ ²⁴/₄₅-⁹⁰/₆₃ ⁴⁰/₄₅-⁹⁰/₆₃ ⁵⁶/₄₅-⁹⁰/₆₃

Subtract Fractions Calculator