Question

There were d passengers in the train. 15% of all of them went in the first car, 20% went in the second car. How many passengers were in the rest of the train?

Answer 1

13/20d

Explanation:

There are a total of "d" people in the train so if you wanted to find out how many were left you would minus 35% of d from d. This is because the first two parts together had 35% of the people and then you would minus that from d to find out about the rest of the train.

d-35%(d)

=13/20d

Answer 2

55% were in the rest of the train. it says "d" though, so I can't tell you the exact number.