Answers

Subtract 4/70 from 8/81

8/81 - 4/70 is 118/2835.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 70 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 81 × 70 = 5670,
   8/81 = 8 × 70/81 × 70 = 560/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   4/70 = 4 × 81/70 × 81 = 324/5670
4. Subtract the two like fractions:
   560/5670 - 324/5670 = 560 - 324/5670 = 236/5670
5. After reducing the fraction, the answer is 118/2835

MathStep (Works offline)

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

Related: ¹⁶/₈₁-⁴/₇₀ ⁸/₈₁-⁸/₇₀ ²⁴/₈₁-⁴/₇₀ ⁸/₈₁-¹²/₇₀ ⁴⁰/₈₁-⁴/₇₀ ⁸/₈₁-²⁰/₇₀ ⁵⁶/₈₁-⁴/₇₀ ⁸/₈₁-²⁸/₇₀

Subtract Fractions Calculator