I got 30.72 % as the answer which can be rounded to 31%. I just wanted to check whether you calculated the change in salary per unit basis and got the answer as 0.31 or did i make a mistake somewhere. I still marked the answer as 0.31 and got it right.
Percentage Change= (Change in Staff cost)*100/(Staff cost in 2008)
There are different time series forecasting methods to forecast stock price, demand etc. In this machine learning project, you will learn to determine which forecasting method to be used when and how to apply with time series forecasting example.
In this machine learning project, you will uncover the predictive value in an uncertain world by using various artificial intelligence, machine learning, advanced regression and feature transformation techniques.