The information given about number of project handle by two companies (A and B) in three different years (2015, 2016 and 2017). Read the information c...

The information given about number of project handle by two companies (A and B) in three different years (2015, 2016 and 2017). Read the information carefully and answer the questions given below. In 2015, Total projects handle by A are 1.5 times of B. In 2016, Total project handle by B is 9 more than that of in 2015 and A handle 20 projects. In 2017, total project handle by A is 25% more than that of by B in 2015 and B handle 30 projects. Total projects handle by A in all three years is 42.
If company C handled 50% more projects in 2015 than company A did in 2017, what is the ratio of projects handled by B in 2015 to projects handled by C in 2015?