Answer: He is
of the distance from start to check point 1.
Explanation:
Since we have given that
When you get to the first checkpoint
he is 2/5 of the distance away to the second checkpoint.=

When you get to the second checkpoint you are 1/4 of the distance to the finish. =
so, the distance from start to the check point 1 is given by

Hence, he is
of the distance from start to check point 1.