Since we were trying to compare two proportions with large sample size, so we can use z test and chi squared test. And we sat the NULL hypothesis as:The ratio of FHV rides originated from Manhattan in 2016 over 2015 was the same or higher than the ratio of FHV pickups  originated outside Manhattan in 2016 over 2015.
H_0: frac{{Non-Manhattan{2016}}{Non-Manhattan{{2015}}} <= frac{Manhattan{2016}}{Manhattan{2015}}
H_1: frac{{Non-Manhattan{2016}}{Non-Manhattan{{2015}}} > frac{Manhattan{2016}}{Manhattan{2015}}
or:
H_0: frac{{Non-Manhattan{2016}}{Non-Manhattan{{2015}}} - frac{Manhattan{2016}}{Manhattan{2015}}<=0
H_1: frac{{Non-Manhattan{2016}}{Non-Manhattan{{2015}}} -frac{Manhattan{2016}}{Manhattan{2015}}>0 
We sat the significance level  alpha=0.05
Result: