Decimals and Shaded Models

If Model A represents one whole unit, what mathematical operation is used to determine what portion of the whole Model B represents?

If Model A represents one whole unit, and Model B is fully shaded except for 18 squares, how many shaded squares are there in Model B?

Given that Model A, fully shaded, represents the number 1, which expression represents the value of one individual square in Model A?

If Model A represents 1, and Model B has 82 shaded squares, what decimal number is represented by Model B?

Model A is fully shaded, representing a value of 1. Model B has only the perimeter shaded. What decimal represents the shaded portion of Model B?

If Model A represents 1, and Model B represents 0.82, what is the difference in the number of shaded squares between Model A and Model B?

A new model, Model C, has twice as many shaded squares as Model B. If Model A represents 1, and Model B represents 0.82, what decimal does Model C represent?

If Model A represents 1 and Model B has 10 fewer shaded squares, then what decimal represents Model B?

If Model A represents 1, what percentage of Model B needs to be shaded if it's decimal representation is 0.5?

If both Model A and Model B were combined into one, what is the resulting value represented in decimal form, assuming Model A represents 1 and Model B is 0.82?