Answers

Subtract 6/8 from 21/6

1^st number: 3 3/6, 2^nd number: 6/8

21/6 - 6/8 is 11/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 8 is 24
   
   Next, find the equivalent fraction of both fractional numbers with denominator 24
2. For the 1st fraction, since 6 × 4 = 24,
   21/6 = 21 × 4/6 × 4 = 84/24
3. Likewise, for the 2nd fraction, since 8 × 3 = 24,
   6/8 = 6 × 3/8 × 3 = 18/24
4. Subtract the two like fractions:
   84/24 - 18/24 = 84 - 18/24 = 66/24
5. After reducing the fraction, the answer is 11/4
6. In mixed form: 23/4

MathStep (Works offline)

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

Related: ⁴²/₆-⁶/₈ ²¹/₆-¹²/₈ ²¹/₁₂-⁶/₈ ²¹/₆-⁶/₁₆ ⁶³/₆-⁶/₈ ²¹/₆-¹⁸/₈ ²¹/₁₈-⁶/₈ ²¹/₆-⁶/₂₄ ²¹/₆-³⁰/₈ ²¹/₃₀-⁶/₈ ²¹/₆-⁶/₄₀ ²¹/₆-⁴²/₈ ²¹/₄₂-⁶/₈ ²¹/₆-⁶/₅₆

Subtract Fractions Calculator