Scales

Black_rose1809

So I got a digital scale from like Walmart, health doctor brand. I been checking my weight both at my aerobics class and at home, at the class I'm 178 and the one at home is 180. I don't know why it changes. I think the 178 is right, since the scale at the class is the doctor's office kind. But I hate how the scale at home has a 2 pounds difference. I think it's the floor though, since the person that put the new floor in made some of them crooked and higher than some. Does anyone have any tips on where to go check my weight instead in my bathroom?