Windsor Power and Telecommunications Corporation has three divisions. The names of these divisions, along with the after-tax cost of capital for each division and the market value of the assets in each division, are as follows:

Division NameCost of CapitalMV of AssetsInfrastructure development7.70$220,000,000Power6.50$286,000,000Telecommunications7.25$594,000,000

What is the overall after-tax cost of capital for Windsor Power and Telecommunications? (Round answer to 2 decimal places, e.g. 52.75%.)

After-tax cost of capital? ____%