The task is to generate the correct answer for a given math problem.
--------
Question: Problem: a number x is 5 times another number y . the percentage that y is less than x is

Answer: 80 %


Question: Problem: a man rows his boat 110 km downstream and 90 km upstream , taking 3 hours each time . find the speed of the stream ?

Answer: 3.5


Question: Problem: in δ pqs above , if pq = 4 and ps = 5 , then

Answer:
10 /