imc

We should realize that the two equations are 100 terms apart, so by subtracting the two equations in a form like... $$(a_{101}-a_1)+(a_{102}-a_2)+...+(a_{200}-a_{100})=200-100=100$$ ...we get the value of the common difference of every hundred terms one hundred times. So we have to divide the answer by one hundred to get ... $\frac{100}{100}=1$ ...the common difference of every hundred terms. Then we have to simply divide the answer by hundred again to find the common difference between one term, therefore... $\frac{1}{100}=\boxed{0.01}$