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Example 18 - Chapter 8 Class 7 Comparing Quantities
Last updated at March 23, 2023 by Teachoo
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Transcript
Example 18 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% πΏππ π /120 = (10%)/(100%) 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
