1. The problem statement, all variables and given/known data Suppose you measure three numbers as follows: 2. Relevant equations x= 200. +-2. y= 50. +-2. z= 40. +-2. where the three uncertainties are independent and random. Use step-by-step propagation to find the quantity q= x/(y-z) with its uncertainty. 3. The attempt at a solution I do not know what to do. The only thing I am thinking of doing is taking the derivatives of the func., q= x/(y-z), with respect to x, y, and z, .... and .... that's it. I'm stuck. Help, please?