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.
Step 4. Divide the amount you lost -- in this example, 50 pounds -- by your original weight. If you divide 50 by 200, you get 0.25. Step 5. Multiply the answer by 100: 0.25 multiplied by 100 calculates to be 25, or 25 percent. This is the percentage of body weight you've lost.