Answers

Subtract 40/21 from 80/15

1^st number: 5 5/15, 2^nd number: 1 19/21

80/15 - 40/21 is 24/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   80/15 = 80 × 7/15 × 7 = 560/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   40/21 = 40 × 5/21 × 5 = 200/105
4. Subtract the two like fractions:
   560/105 - 200/105 = 560 - 200/105 = 360/105
5. After reducing the fraction, the answer is 24/7
6. In mixed form: 33/7

MathStep (Works offline)

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

Related: ⁸⁰/₁₅-⁸⁰/₂₁ ⁸⁰/₃₀-⁴⁰/₂₁ ⁸⁰/₁₅-⁴⁰/₄₂ ⁸⁰/₄₅-⁴⁰/₂₁ ⁸⁰/₁₅-⁴⁰/₆₃ ⁸⁰/₇₅-⁴⁰/₂₁

Subtract Fractions Calculator