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.
Subtract your current weight from your original weight. Divide the result by your original weight. That number equals the percentage of weight lost. For example, if you used to weigh 135 pounds and lost 15 pounds, you now weight 120.