Suppose you add 10% of a number to the number, and then you subtract 10% of the total. Is the result greater than, less then, or equal to the original number?
Let's say the number is 9. 10% of 9 is 0.9. Add that to 9 and you would get 9.9. 10% of 9.9 is 0.99. Subtract and you would get 8.91. Then you could do the rest.
