Question

the population of an elementary school is 400 didn't.A. That represents a 20% increase over last year's student population. About how many students attended the school last year?B. Next year the student population is expected to increase another 20% what is the expected student population for next year?

Answer 1

Answer:

Population of the school last year = 320

Expected student population for next year = 480

Explanations:

The present population of the school = 400

a) How many students attended the school last year

Since from last year till now, there has been a 20% increase in the school's population. This means that the population of the school last year was 80% of the current population.

Population of the school last year = 80% of the current population

Population of the school last year = (80/100) x 400

Population of the school last year = 0.8 x 400

Population of the school last year = 320

b) The expected population of the school next year

Since the population of the school is expected to increase by 20% next year. This means that the population of the school by next year will be 120% of the current population

Expected student population for next year = 120% of the current population

Expected student population for next year = (120/100) x 400

Expected student population for next year = 1.2 x 400

Expected student population for next year = 480