Example 12 - Chapter 7 Class 7 Comparing Quantities
Last updated at Dec. 16, 2024 by Teachoo
Last updated at Dec. 16, 2024 by Teachoo
Example 12 The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years. What is the percentage of decrease? C.P = Rs 120 S.P = ? Loss percentage = 10% πΏππ π /(πΆ.π) Γ 100 = 10 π³πππ/πππ Γ 100 = 10 πΏππ π /120 = 10/100 Loss = 10/100 Γ 120 Loss = 1/10 Γ 120 Loss = Rs 12 Now, Loss = CP β SP SP = CP β Loss = Rs (120 β 12) = Rs 108 It is sold Rs 108
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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