Answer: 81% of 16 is 12.96, but we'll round that up to 13 because you can't have .96 of a person. That leaves 3 members not present which is your answer.
Step-by-step explanation: To find 81% of 16, you must make 81% a decimal. 81% is 81/100 as a fraction, and in decimal form is .81. Then multiply .81 by 16, and you'll have 12.96. We're counting that as 13 for the sake of rounding. Then subtract 13 from 16 and you'll have 3 as your answer.