What is the difference between a 10.0% (v/v) methanol (CH₄O) solution and a 10.0% (m/m) methanol solution?

What is the mass/volume percent concentration of the following solutions:0.075 mol sucrose (C₁₂H₂₂O₁₁) in 270 mL of solution.

The pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)