Question 253020
When dealing with percentage INCREASES always remember that the price is increased by itself plus the percentage increase.

So in this example the original price is $1000. It is increased (multiplied) by itself (so 1) plus the percentage (0.15). So prices is increased to $1150.

Another way of looking at is to find 15% of the original price and then add this to the original price. So 1 percent of $1000 is $10, so 15 percent must be 15 times $10 which is $150.

Does that make sense?