Final answer:
Jimmy has completed 20 push-ups so far, which is 40 percent of his weekly goal of 50 push-ups.
Step-by-step explanation:
Jimmy set up a goal to do 50 push-ups every week, and he has completed 40 percent of his goal. To calculate how much he has done, we need to find 40 percent of 50.
To find the percentage of a number, you can multiply the number by the percentage (expressed as a decimal). Here, we calculate as follows: 50 push-ups × 0.40 (40 percent as a decimal) = 20 push-ups.
Therefore, Jimmy has completed 20 push-ups so far toward his goal of 50 push-ups for the week.