We get plus 500 grams. Now we multiply the whole thing by 100 to find the percentage, and we get 8.5%. The mass perceptive of gold is 8.5. To find the mass perceptive carbon, we follow the same exact formula. 25 grams of carbon divided by the total grams of the solution multiplied by 100 gives us 4.4%. So the max percent of carbon is 4.4.