In one of our questions in school, we are asked,
For a given index finger length which of the following groups has the longest ring finger if the $2$D:$4$D ratio is:
Group A $0.96$,
Group B $0.98 $
Group C $0.99$ and
Group D $1.01$.
[Definition: $2$D:$4$D ratio means the ratio of the length of the index finger(2D) to ring finger (4D)]
The answer is Group A but I'm finding it very difficult to understand this especially with zeros involved in the ratios. I would be very grateful if someone could explain where the answer came from and how you got it. Thank you.