Jonah saw a news report that stated that 72% of children in his town played a sport last year. If there are 4,000 children in his town, how many children in his town played a sport last year?

The number of children in Jonah's town who played a sport last year is 72/100*4000 = <<72/100*4000=2880>>2880. Answer: \boxed{2880}.

To find out how many children in Jonah's town played a sport last year, you can multiply the total number of children in the town by the percentage of children who played a sport.

Step 1: Convert 72% to a decimal by dividing it by 100.
72% = 72/100 = 0.72

Step 2: Multiply the decimal by the total number of children in the town.
0.72 * 4,000 = 2,880

Therefore, 2,880 children in Jonah's town played a sport last year.

To find out how many children in Jonah's town played a sport last year, we can start by calculating 72% of the total number of children in the town.

Step 1: Convert the percentage to a decimal by dividing by 100:
72% ÷ 100 = 0.72

Step 2: Multiply the decimal by the total number of children in the town:
0.72 × 4,000 = 2,880

Therefore, 2,880 children in Jonah's town played a sport last year.