Consider the volume of a rectangular pyramid, one whose base is not square. Does changing one of the three variables (length, width, or height) by a given fraction have a greater effect on the volume

Consider the volume of a rectangular pyramid, one whose base is not square. Does changing one of the three variables (length, width, or height) by a given fraction have a greater effect on the volume of the pyramid than changing either of the other two variables? That is, which variable, if any, has the largest influence on the volume? Assume that the other two variables remain constant. Explain your answer.