Answers

Subtract 49/81 from 42/8

1^st number: 5 2/8, 2^nd number: 49/81

42/8 - 49/81 is 1505/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 8 × 81 = 648,
   42/8 = 42 × 81/8 × 81 = 3402/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   49/81 = 49 × 8/81 × 8 = 392/648
4. Subtract the two like fractions:
   3402/648 - 392/648 = 3402 - 392/648 = 3010/648
5. After reducing the fraction, the answer is 1505/324
6. In mixed form: 4209/324

MathStep (Works offline)

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

Related: ⁸⁴/₈-⁴⁹/₈₁ ⁴²/₈-⁹⁸/₈₁ ⁴²/₁₆-⁴⁹/₈₁ ⁴²/₂₄-⁴⁹/₈₁ ⁴²/₄₀-⁴⁹/₈₁ ⁴²/₅₆-⁴⁹/₈₁

Subtract Fractions Calculator