Your first line is incorrect; you calculated 7.5% of your disty portion (which is only 92.5% of your total mass). Take your 500g and divide by .925 and you’ll get a “cut” mass of 40.54g. The rest is correct from there.
Your first line is incorrect; you calculated 7.5% of your disty portion (which is only 92.5% of your total mass). Take your 500g and divide by .925 and you’ll get a “cut” mass of 40.54g. The rest is correct from there.