How much percentage of steel is added to 1m cube of concrete slab?

I agree with specialists answers

its depend on dia of bar used in concrete for example the weight of steel of one meter rod having six mm dia is two hundrerd and twenty grams and ten mm dia is six hundrerd and twenty grams etc you can find weight of different bars having different diameters by this formula = (d*d)/one hundrerd sixty two

Percentage of steel being used for the concrete slab is between 0.6 to 1.2 %.

It depends on the steel requirement on the designed structure but steel ratio commonly used on columns are from 2 to 3 %, on slab are 0.5 to 1.5 % and beams are 1 to 1.5 %.