Respuesta :

Answer:

¹¹⁹/₁₂₀ gallon

Step-by-step explanation:

1. Total amount of paint owned: 1 ¹/₅ + 1 ¹/₆ + ⁷/₈ =  ³⁸⁹/₁₂₀ gallons

2. Total amount of paint used: 3 * ³/₄ = ⁹/₄ gallons

3. Amount left: ³⁸⁹/₁₂₀ - ⁹/₄ = ¹¹⁹/₁₂₀ gallon