Answers

Subtract 40/7 from 3/12

1^st number: 3/12, 2^nd number: 5 5/7

3/12 - 40/7 is -153/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 7 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   3/12 = 3 × 7/12 × 7 = 21/84
3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
   40/7 = 40 × 12/7 × 12 = 480/84
4. Subtract the two like fractions:
   21/84 - 480/84 = 21 - 480/84 = -459/84
5. After reducing the fraction, the answer is -153/28

MathStep (Works offline)

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

Related: ⁶/₁₂-⁴⁰/₇ ³/₁₂-⁸⁰/₇ ³/₂₄-⁴⁰/₇ ³/₁₂-⁴⁰/₁₄ ⁹/₁₂-⁴⁰/₇ ³/₃₆-⁴⁰/₇ ³/₁₂-⁴⁰/₂₁ ¹⁵/₁₂-⁴⁰/₇ ³/₆₀-⁴⁰/₇ ³/₁₂-⁴⁰/₃₅ ²¹/₁₂-⁴⁰/₇ ³/₈₄-⁴⁰/₇ ³/₁₂-⁴⁰/₄₉

Subtract Fractions Calculator