The number 40 is decreased to 39. What is the percentage by which the number was decreased, to the nearest tenth of a percent?

  2.5%

Step-by-step explanation:

The percent change is found by ...

  ((new value)/(old value) -1)×100% = (39/40 -1)×100% = -2.5%

The change to 39 represents a 2.5% decrease.

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.