By what percent will a fraction decrease if its numerator is decreased by 50% and its denominator is decreased by 25%? and no, it is not 33, 33.3, 66, or 66.6 percent.

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample