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.
We can use the SUMPRODUCT function to multiply each score by its weight and then sum those products. This gives us a result of 81.43. This can be simplified if the sum of the weights in 1. For example, if we use as weights percentages, the weights in the example above become 14%, 14%, 29%, and 43%. This works because the sum of the weights is 1, so we are just eliminating the unnecessary division by 1. This page last updated: 28-Oct-2008.