instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: the population of a city is 415600 . it increased by 25 % in the first year and decreased by 30 % in the second year . what is the population of the city at the end of second year ?
answer:
363650

question:
Problem: amit and ananthu can do a work in 10 days and 20 days respectively . amit started the work and left after 2 days . ananthu took over and completed the work . in how many days was the total work completed ?
answer:
18 days

question:
Problem: if the radius of a circle is increased by 20 % then the area is increased by :
answer:
44 %