Answers

Subtract 10/36 from 81/30

1^st number: 2 21/30, 2^nd number: 10/36

81/30 - 10/36 is 109/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 36 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 30 × 6 = 180,
   81/30 = 81 × 6/30 × 6 = 486/180
3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
   10/36 = 10 × 5/36 × 5 = 50/180
4. Subtract the two like fractions:
   486/180 - 50/180 = 486 - 50/180 = 436/180
5. After reducing the fraction, the answer is 109/45
6. In mixed form: 219/45

MathStep (Works offline)

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

Related: ⁸¹/₃₀-²⁰/₃₆ ⁸¹/₆₀-¹⁰/₃₆ ⁸¹/₃₀-¹⁰/₇₂ ⁸¹/₃₀-³⁰/₃₆ ⁸¹/₉₀-¹⁰/₃₆ ⁸¹/₃₀-⁵⁰/₃₆ ⁸¹/₃₀-⁷⁰/₃₆

Subtract Fractions Calculator