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Creating new raster using raster calculator giving odd negative values

I am trying to create a new raster using the raster calculator to select particular values. In this instance I have a raster with values ranging from -0.4276 to 0.829624. Using the raster calculator I am inputting "RasterName"/("RasterName" > 0.05). I am getting the raster I want, but I was expecting to get raster values ranging from 0.051 (or something close to it) to 0.829624 (essentially the lowest value to the pre-existing highest value). Instead I am getting a low value of -340,282,346,... and an upper value of 0.814263.

How do I fix this using the raster calculator?

The first image is of the raw raster values and the second is of the new raster values after calculating.

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