Hi everyone, I have a similar problem of the answer not being correct. This is what I did...I first did 100 - 15 = 85% (because it is decreasing so you take-away)then I did 85 / 100 = 0.85From 2010 to 2016 it is 6 years so I made an equation of p x 0.85^6 = 10,000to get p I did 10,000 / 0.85^6 (this part I would do use a calculator) which gives me 26514.6834 and I rounded to 3 significant figures which is 265 right? That's my answer, 265. Can someone please please please tell me if this is correct otherwise if this is wrong please tell me the correct answer because then at least I can see where I went wrong and I would do the question again to get the answer.