Answers

Subtract 15/81 from 49/72

49/72 - 15/81 is 107/216.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 72 × 9 = 648,
   49/72 = 49 × 9/72 × 9 = 441/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   15/81 = 15 × 8/81 × 8 = 120/648
4. Subtract the two like fractions:
   441/648 - 120/648 = 441 - 120/648 = 321/648
5. After reducing the fraction, the answer is 107/216

MathStep (Works offline)

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

Related: ⁹⁸/₇₂-¹⁵/₈₁ ⁴⁹/₇₂-³⁰/₈₁ ⁴⁹/₇₂-⁴⁵/₈₁ ⁴⁹/₇₂-⁷⁵/₈₁

Subtract Fractions Calculator