If you need to do a $1$:$20$ dilution on a culture to get acceptable plate counts,$$how many milliliters of original sample will you add to a final volume of $16$ mL$?$ Report your answer in standard decimal notation rounded to two decimal places.

For this course, a $1$:$20$ dilution is $1$ part culture to a final volume of $20$ parts.

For example, $1$ mL$$culture and $19$ mL$$sterile DI water.

Report your answer in standard notation rounded to $2$ decimal place

Include trailing zeros if necessary so your answer has $2$ decimal places