Saul has 20 pairs of shoes. 20% of his shoes are Jordans. 45% of his shoes are Vans. The rest of his shoes are shoes are Converse. How many of his shoes are Converse? help pls its due tonight

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?