1,400 students wore hats while 200 students did not wear hats. What percent of the school population did NOT wear hats?

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom