Answers

Subtract 81/40 from 10/36

1^st number: 10/36, 2^nd number: 2 1/40

10/36 - 81/40 is -629/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 36 × 10 = 360,
   10/36 = 10 × 10/36 × 10 = 100/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   81/40 = 81 × 9/40 × 9 = 729/360
4. Subtract the two like fractions:
   100/360 - 729/360 = 100 - 729/360 = -629/360

MathStep (Works offline)

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

Related: ²⁰/₃₆-⁸¹/₄₀ ¹⁰/₇₂-⁸¹/₄₀ ¹⁰/₃₆-⁸¹/₈₀ ³⁰/₃₆-⁸¹/₄₀ ⁵⁰/₃₆-⁸¹/₄₀ ⁷⁰/₃₆-⁸¹/₄₀

Subtract Fractions Calculator