Amy thought there were 25 students in her math class, but there are actually 27 students. What is the percent error?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?