Answers

Subtract 49/45 from 18/80

1^st number: 18/80, 2^nd number: 1 4/45

18/80 - 49/45 is -311/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 45 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   18/80 = 18 × 9/80 × 9 = 162/720
3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
   49/45 = 49 × 16/45 × 16 = 784/720
4. Subtract the two like fractions:
   162/720 - 784/720 = 162 - 784/720 = -622/720
5. After reducing the fraction, the answer is -311/360

MathStep (Works offline)

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

Related: ³⁶/₈₀-⁴⁹/₄₅ ¹⁸/₈₀-⁹⁸/₄₅ ¹⁸/₈₀-⁴⁹/₉₀ ⁵⁴/₈₀-⁴⁹/₄₅ ⁹⁰/₈₀-⁴⁹/₄₅

Subtract Fractions Calculator