8целых 3/4*2целых 4/7-10целых1/8*3целых1/3

8³/₄×2⁴/₇-10¹/₈×3¹/₃ = - 11,25

8³/₄×2⁴/₇ =³⁵/₄×¹⁸/₇  = ³⁵ˣ¹⁸/₄ₓ₇ = ⁵ˣ⁹/₂ = ⁴⁵/₂

10¹/₈×3¹/₃ =⁸¹/₈×¹⁰/₃  =⁸¹ˣ¹⁰/₈ₓ₃ = ²⁷ˣ⁵/₄ₓ₁ = ¹³⁵/₄

⁴⁵/₂ - ¹³⁵/₄ = ⁴⁵ˣ²/₄ - ¹³⁵/₄ = ⁹⁰⁻¹³⁵/₄ = - ⁴⁵/₄ = - 11¹/₄ = - 11,25