10% 25% 45% 65% 80%1/10 1/4 9/20 13/20 4/50.1 0.25 0.45 0.65 0.810%＝1/10＝0.125%＝1/4＝0.2545%＝9/20＝0.4565%＝13/20＝0.6580%＝4/5＝0.8
