How to calculate concentration of unknown saturated stock solution from diluted solution whose concentration is known?

I want to measure the solubility of a compound. I prepared a saturated stock solution of my compound in 100ml of water by dissolving it in excess and filtering out the undissolved sample. 


Then I took 1ml of saturated solution, diluted it to 10ml and measured the absorbance on a UV spectrophotometer. After that I calculated the concentration of diluted solution by plotting a calibration curve of various solutions of known concentrations. 


Now how can I calculate the concentration of my saturated stock solution from diluted one? 


The concentration of diluted solution is 17ppm/10ml. 


