Hello,
When I find the voltage difference between ground and a point between the two resistors, I get about 2.2V, when I expect 2.5V. I switched the resistors in case the resistances were far from their stated values of 2 MOhm, but I got the same voltage. I also tried new batteries and two different bread boards, but got the same voltage. Can you tell me why the measured voltage is low? Do bread boards have resistance large enough to create the voltage drop? Thanks.