Of the two 60 cases of CP children in the control and EA groups , 20 ( 33.33 % ) and 22 ( 36.67 % ) experienced marked improvement , 24 ( 40.00 % ) and 30 ( 50.00 % ) were effective , and 16 ( 26.67 % ) and 8 ( 13.33 % ) failed , with the effective rates being 73.33 % and 86.67 % respectively .