(1/2 + 1/4 - 2/5) : 4/5 = ⁷/₁₆
¹/₂ + ¹/₄ = ²⁺¹/₄ = ³/₄
³/₄ - ²/₅ = ¹⁵/₂₀ - ⁸/₂₀ = ⁷/₂₀
⁷/₂₀ : ⁴/₅ = ⁷/₂₀ × ⁵/₄ = ⁷ˣ⁵/₂₀ₓ₄ = ⁷/₁₆
(³/₄+¹/₆) × 3+(⁵/₆ - ¹/₂) : ²/₉ = 13,875
³/₄ + ¹/₆ = ⁹/₁₂ + ²/₁₂ = ¹¹/₁₂
¹¹/₁₂ × 3 = ¹¹ˣ³/₁₂ = ¹¹/₄
⁵/₆ - ¹/₂ = ⁵/₆ - ³/₆ = ⁵⁻³/₆ = ²/₆ = ¹/₃
¹¹/₄ + ¹/₃ = ¹¹ˣ³/₁₂ + ¹ˣ⁴/₁₂ = ³³/₁₂ + ⁴/₁₂ = ³⁷/₁₂
³⁷/₁₂ : ²/₉ = ³⁷/₁₂ × ⁹/₂ = ³⁷ˣ⁹/₁₂ₓ₂ = ¹¹¹/₈ = 13,875