Answers

Subtract 6/81 from 7/4

1^st number: 1 3/4, 2^nd number: 6/81

7/4 - 6/81 is 181/108.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 4 × 81 = 324,
   7/4 = 7 × 81/4 × 81 = 567/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   6/81 = 6 × 4/81 × 4 = 24/324
4. Subtract the two like fractions:
   567/324 - 24/324 = 567 - 24/324 = 543/324
5. After reducing the fraction, the answer is 181/108
6. In mixed form: 173/108

MathStep (Works offline)

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

Related: ¹⁴/₄-⁶/₈₁ ⁷/₄-¹²/₈₁ ⁷/₈-⁶/₈₁ ²¹/₄-⁶/₈₁ ⁷/₄-¹⁸/₈₁ ⁷/₁₂-⁶/₈₁ ³⁵/₄-⁶/₈₁ ⁷/₄-³⁰/₈₁ ⁷/₂₀-⁶/₈₁ ⁴⁹/₄-⁶/₈₁ ⁷/₄-⁴²/₈₁ ⁷/₂₈-⁶/₈₁

Subtract Fractions Calculator