Answers

Subtract 49/8 from 21/80

1^st number: 21/80, 2^nd number: 6 1/8

21/80 - 49/8 is -469/80.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 8 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   21/80 = 21 × 1/80 × 1 = 21/80
3. Likewise, for the 2nd fraction, since 8 × 10 = 80,
   49/8 = 49 × 10/8 × 10 = 490/80
4. Subtract the two like fractions:
   21/80 - 490/80 = 21 - 490/80 = -469/80

MathStep (Works offline)

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

Related: ⁴²/₈₀-⁴⁹/₈ ²¹/₈₀-⁹⁸/₈ ²¹/₈₀-⁴⁹/₁₆ ⁶³/₈₀-⁴⁹/₈ ²¹/₈₀-⁴⁹/₂₄ ²¹/₈₀-⁴⁹/₄₀ ²¹/₈₀-⁴⁹/₅₆

Subtract Fractions Calculator