Answer: 1) 2xy²/3y³ - Simplify the y terms: y²/y³ = y⁻¹- The simplified expression: (2x)/(3y) 2) 8x⁴y²/4x³y⁵ - Simplify the coefficients: 8/4 = 2- Simplify the x terms: x⁴/x³ = x- Simplify the y terms: y²/y⁵ = y⁻³- The simplified expression: 2xy⁻³ (or 2x/y³) 3) 9x⁷y⁵/12x⁵y² - Simplify the coefficients: 9/12 = 3/4- Simplify the x terms: x⁷/x⁵ = x²- Simplify the y terms: y⁵/y² = y³- The simplified expression: (3x²y³)/4 4) 4a²b³/12a²b⁵c - Simplify the coefficients: 4/12 = 1/3- Simplify the a terms: a²/a² = 1 (they cancel out)- Simplify the b terms: b³/b⁵ = b⁻²- The simplified expression: (b⁻²)/(3c) (or 1/(3b²c))