# The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. What was the population two years ago

**Solution:**

The present population of the town = 6,31,680

The present population is 4% less than the previous year’s population.

If previous year’s population is x then:

x - 0.04x = 6,31,680

0.96x = 631,680

x = 631,680/0.96

x = 658,000

Therefore the previous year’s population is 658,000

The population of 658,000 is less than the previous year population by 6%

If the previous years population is y then it decreases by 6% to result in a population of 658,000

Therefore we can write:

y - 0.06y = 658,000

0.94y = 658,000

y = 658,000/0.94

y = 700,000

Hence, the population two years ago was 700,000.

**✦ ****Try This: **The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 864,800. Last year

the migration was 6% and the year before last, it was 8%. What was the population two years ago?

The present population of the town = 6,31,680

The present population is 4% less than the previous year’s population.

If previous year’s population is x then:

x - 0.06x = 8,64,800

0.94x = 8,64,800

x = 8,64,800/0.94

x = 920,000

Therefore the previous year’s population is 658,000

The population of 9,20,000 is less than the previous year population by 6%

If the previous years population is y then it decreases by 8% to result in a population of 920,000

Therefore we can write:

y - 0.08y = 9,20,000

0.92y = 9,20,000

y = 9,20,000/0.92

y = 10,00,000

Hence, the population two years ago was 10,00,000.

**☛ Also Check: **NCERT Solutions for Class 8 Maths

**NCERT Exemplar Class 8 Maths Chapter 9 Problem 91**

## The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. What was the population two years ago

**Summary:**

The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. The population two years ago was 700,000

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