Atrain arrives at the station with 150 passenger's on board . 2/5 of the passengers get off the train in seattle, and then 35 passengers board the train. how many passengers are on the train when it leaves the station

First, We Have Find What Two Fifths Of 150. So, Divide 150 By Five To Find 1/5 Of 150. 
150 ÷ 5 = 30.
 
Now, To Find 2/5 Of 150, Multiply 30 By Two. So:
30 * 2 = 60
So, 60 = 2/5 of 150.

So, subtract 60 from 150. 
150 - 60 = 90.

So, now we need to add 35, because 35 people get back on. 

90 + 35 = 125

There are 125 passengers when the train leaves.