Answers

Subtract 16/21 from 21/6

1^st number: 3 3/6, 2^nd number: 16/21

21/6 - 16/21 is 115/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 21 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 6 × 7 = 42,
   21/6 = 21 × 7/6 × 7 = 147/42
3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
   16/21 = 16 × 2/21 × 2 = 32/42
4. Subtract the two like fractions:
   147/42 - 32/42 = 147 - 32/42 = 115/42
5. In mixed form: 231/42

MathStep (Works offline)

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

Related: ⁴²/₆-¹⁶/₂₁ ²¹/₆-³²/₂₁ ²¹/₁₂-¹⁶/₂₁ ²¹/₆-¹⁶/₄₂ ⁶³/₆-¹⁶/₂₁ ²¹/₆-⁴⁸/₂₁ ²¹/₁₈-¹⁶/₂₁ ²¹/₆-¹⁶/₆₃ ²¹/₆-⁸⁰/₂₁ ²¹/₃₀-¹⁶/₂₁ ²¹/₄₂-¹⁶/₂₁

Subtract Fractions Calculator