Help me put this in order please help thanks

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10