8.5 as a fraction is 8.5/1. To make the denominator 4, you must multiply both the top and bottom by 4 (4x8.5/1x4). This gives you your answer, which is 34/4. To double check this, you just divided 34 by 4. This equals 8.5, which is the original number.
<span><u><em>Answer:</em></u>
83.21 mm.<span>
<u><em>Explanation:</em></u>
<u>Circumference of a circle is is found by using the formula:</u>
C=πd.
C is the Circumference.
d is diameter.
π is the ratio for Pi,
<u>In this case we will use:</u>
3.14 instead of π
d = 26.5 mm
<u>Plug in the known values. </u>
C=(3.14)(26.5) = 83.21 mm</span></span>