Example 11 - Chapter 7 Class 7 Comparing Quantities

Last updated at August 4, 2026 by

Example 11 - The number of illiterate persons in a country decreased - Examples

part 2 - Example 11 - Examples - Serial order wise - Chapter 7 Class 7 Comparing Quantities

Remove Ads

Transcript

Example 11 The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years. What is the percentage of decrease? Initial number of illiterate people = 150 lakhs Number of illiterate people after 10 years = 100 lakhs Decrease in number of illiterate people = 150 − 100 = 50 lakhs Percentage decrease = (𝑫𝒆𝒄𝒓𝒆𝒂𝒔𝒆 𝒊𝒏 𝒏𝒖𝒎𝒃𝒆𝒓 )/(𝑰𝒏𝒊𝒕𝒊𝒂𝒍 𝒏𝒖𝒎𝒃𝒆𝒓) × 100% = 50/150 × 100% = 5/15 × 100% = 1/3 × 100% = 100/3 % = 33 𝟏/𝟑 %

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.