Answers

Subtract 70/4 from 70/81

1^st number: 70/81, 2^nd number: 17 2/4

70/81 - 70/4 is -2695/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 4 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   70/81 = 70 × 4/81 × 4 = 280/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   70/4 = 70 × 81/4 × 81 = 5670/324
4. Subtract the two like fractions:
   280/324 - 5670/324 = 280 - 5670/324 = -5390/324
5. After reducing the fraction, the answer is -2695/162

MathStep (Works offline)

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

Related: ⁷⁰/₈₁-⁷⁰/₈ ⁷⁰/₈₁-⁷⁰/₁₂ ⁷⁰/₈₁-⁷⁰/₂₀ ⁷⁰/₈₁-⁷⁰/₂₈

Subtract Fractions Calculator