In 1938 in Polotsk there were 30 thousand itel, and in their 2009 there were 81.7 thousand. By how many percent did the population of Polotsk during this time increase?

181
30000 = 100 - there was a population 81700= x x =81700*100/30000 h272.33 - became the population 100-272.33=-172.33 Answer: the population increased approximately by 172.33
306
Answer add