Example 11 - Chapter 7 Class 7 Comparing Quantities

Last updated at Dec. 16, 2024 by

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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 %

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo