If 2652 people out of 100,000 people were killed in 2003, how many were killed in 2000? The answer is 25% more than the amount killed in 2003.

In the last sentence of the word problem, I believe you mean 25% more than how many were killed in 2003 no matter how many people altogether there were then. To determine how many more by percentage, you determine the percentage (%) of the entire number
so that you can use this plus (+) the percentage. Here's how it goes:

25% of 2652 -- Now in this phrase, the % symbol means you move the decimal point 2 places to the left, and the keyword "of" means *, so you multiply. Now this explanation will set up the problem like this:

.25*2652=663

So now 25% of 2652 is 663 to add to that entire number, so now comes the final step:

2652+663=3315

The final answer is that 3315 people out of 100,000 were killed in 2000.

Also, the fastest way to determine how much more or less by a percentage is n*(1+.01x) or n*(1-.01x), respectively, where n is the main number, and x is the percentage (i.e. a number followed by the symbol %).

## Comments

So what's your question? It appears you gave both a question and an answer (??)