Answers

Subtract 21/6 from 8/90

1^st number: 8/90, 2^nd number: 3 3/6

8/90 - 21/6 is -307/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 6 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   8/90 = 8 × 1/90 × 1 = 8/90
3. Likewise, for the 2nd fraction, since 6 × 15 = 90,
   21/6 = 21 × 15/6 × 15 = 315/90
4. Subtract the two like fractions:
   8/90 - 315/90 = 8 - 315/90 = -307/90

MathStep (Works offline)

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

Related: ¹⁶/₉₀-²¹/₆ ⁸/₉₀-⁴²/₆ ⁸/₉₀-²¹/₁₂ ²⁴/₉₀-²¹/₆ ⁸/₉₀-⁶³/₆ ⁸/₉₀-²¹/₁₈ ⁴⁰/₉₀-²¹/₆ ⁸/₉₀-²¹/₃₀ ⁵⁶/₉₀-²¹/₆ ⁸/₉₀-²¹/₄₂

Subtract Fractions Calculator