Answers

Subtract 30/81 from 84/54

1^st number: 1 30/54, 2^nd number: 30/81

84/54 - 30/81 is 32/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 54 × 3 = 162,
   84/54 = 84 × 3/54 × 3 = 252/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   30/81 = 30 × 2/81 × 2 = 60/162
4. Subtract the two like fractions:
   252/162 - 60/162 = 252 - 60/162 = 192/162
5. After reducing the fraction, the answer is 32/27
6. In mixed form: 15/27

MathStep (Works offline)

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

Related: ⁸⁴/₅₄-⁶⁰/₈₁ ⁸⁴/₅₄-⁹⁰/₈₁

Subtract Fractions Calculator