Answers

Subtract 80/12 from 21/75

1^st number: 21/75, 2^nd number: 6 8/12

21/75 - 80/12 is -479/75.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 12 is 300
   
   Next, find the equivalent fraction of both fractional numbers with denominator 300
2. For the 1st fraction, since 75 × 4 = 300,
   21/75 = 21 × 4/75 × 4 = 84/300
3. Likewise, for the 2nd fraction, since 12 × 25 = 300,
   80/12 = 80 × 25/12 × 25 = 2000/300
4. Subtract the two like fractions:
   84/300 - 2000/300 = 84 - 2000/300 = -1916/300
5. After reducing the fraction, the answer is -479/75

MathStep (Works offline)

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

Related: ⁴²/₇₅-⁸⁰/₁₂ ²¹/₇₅-⁸⁰/₂₄ ⁶³/₇₅-⁸⁰/₁₂ ²¹/₇₅-⁸⁰/₃₆ ²¹/₇₅-⁸⁰/₆₀ ²¹/₇₅-⁸⁰/₈₄

Subtract Fractions Calculator