The ratio of the two ratios that make up the proportion is two fifths, and the two external terms are one half and one fourth. This ratio is () or ()

The ratio of the two ratios that make up the proportion is two fifths, and the two external terms are one half and one fourth. This ratio is () or ()


(1/2):(5/4)=(1/10):(1/4)
or
(1/4):(5/8)=(1/5):(1/2)
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