Question 939684
Circumference of a circle = pi*diameter
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The smaller circle's circumference = {{{(pi)*(1/2) = (pi/2)}}} 
Larger circle's circumference = {{{(pi)*(4)=4pi}}}
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The ratio between the circle's circumference is {{{(pi/2):(4pi)}}}
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When simplified the ratio of the circumference of the larger circle to the smaller is {{{8pi:pi}}}