Answers

Subtract 15/81 from 45/25

1^st number: 1 20/25, 2^nd number: 15/81

45/25 - 15/81 is 218/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 81 is 2025
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2025
2. For the 1st fraction, since 25 × 81 = 2025,
   45/25 = 45 × 81/25 × 81 = 3645/2025
3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
   15/81 = 15 × 25/81 × 25 = 375/2025
4. Subtract the two like fractions:
   3645/2025 - 375/2025 = 3645 - 375/2025 = 3270/2025
5. After reducing the fraction, the answer is 218/135
6. In mixed form: 183/135

MathStep (Works offline)

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

Related: ⁹⁰/₂₅-¹⁵/₈₁ ⁴⁵/₂₅-³⁰/₈₁ ⁴⁵/₅₀-¹⁵/₈₁ ⁴⁵/₂₅-⁴⁵/₈₁ ⁴⁵/₇₅-¹⁵/₈₁ ⁴⁵/₂₅-⁷⁵/₈₁

Subtract Fractions Calculator