Question

The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years.What is the percentage of decrease?

Answer 1

Answer:

Given :

• The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years.

To Find :

• What is the percentage of decrease?

Solution :

Number of person decreases = 50 lakhs

percentage of person decreases :

$\sf \: : \implies \: \: \: \: \: \: \: \: \frac{5000000}{15000000} \times 100 \\ \\ \\ \sf \: : \implies \: \: \: \: \: \: \: \: \frac{1}{ \cancel{3} } \times \cancel{ 100 }\\ \\ \\ \sf \: : \implies \: \: \: \: \: \: \: \: 33.33$

• Hence the 33.33% decrease

Answer 2

$\huge\bold\red{Solution}$

$decrease \: in \: percentage \: = \frac{original \: count \: - new \: count}{original \: count} \times 100 \\ decrease \: in \: percentage \: = \frac{150 - 100}{150} \times 100 \\ = \frac{50}{150} \times 100 = \frac{100}{3} = 33.3\%$