A post office, named Brennen, was located in the limits of present-day Grove in 1888, but the city was not incorporated until the 1890s, Rose Stauber, Grove, Encyclopedia of Oklahoma History and Culture, making it the only incorporated town in Delaware County when Oklahoma became a state.
To calculate the mass percent or weight percent of a solution, you must divide the mass of the solute by the mass of the solution (both the solute and the solvent together) and then multiply by 100 to change it into percent.
For example, if we use as weights percentages, the weights in the example above become 14%, 14%, 29%, and 43%. (These values are calculated by dividing each weight by the sum of the weights.) Since these percentages sum to 100% or 1.0, we can omit the SUM function and simplify the formula to.