A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly 

10 volume solution of ${\mathrm{H}}_2{\mathrm{O}}_2$ is 3.035% solution.

i.e., 3.035 g of ${\mathrm{H}}_2{\mathrm{O}}_2$ is present in 100 ml of the solution.