Answers

Subtract 84/81 from 7/24

1^st number: 7/24, 2^nd number: 1 3/81

7/24 - 84/81 is -161/216.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 24 × 27 = 648,
   7/24 = 7 × 27/24 × 27 = 189/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   84/81 = 84 × 8/81 × 8 = 672/648
4. Subtract the two like fractions:
   189/648 - 672/648 = 189 - 672/648 = -483/648
5. After reducing the fraction, the answer is -161/216

MathStep (Works offline)

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

Related: ¹⁴/₂₄-⁸⁴/₈₁ ⁷/₄₈-⁸⁴/₈₁ ²¹/₂₄-⁸⁴/₈₁ ⁷/₇₂-⁸⁴/₈₁ ³⁵/₂₄-⁸⁴/₈₁ ⁴⁹/₂₄-⁸⁴/₈₁

Subtract Fractions Calculator