Find the sub-duplicate ratio of 9:16 ?
Sub-duplicate ratio of any ratio is ( as the name suggests ) only partially duplicate.
The sub-duplicate ratio of
For the first few seconds you would think that
but this is actually wrong. This is how the name comes, the sub-
duplicate ration looks equivalent ( equal ) to the given ratio but is
actually very different thatn that of the given ratio.
For some more information on this topic : http://www.math-only-math.com/types-of-ratios.html