Jay B.M.I

I have wait for Jay check up to get his weight & height for B.M.I reading. So yesterday I got his height which is 81cm and his weight is 12.1kg.

The B.M.I calculation is Weight (kg) / height (m) x height (m).

So Jay B.M.I is 12.1 / 0.81 x 0.81 = 18.44

What ........ below 18.5 har........ UNDERWEIGHT!!!