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  1. Chapter 8 Class 7 Comparing Quantities
  2. Serial order wise
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Ex 8.3, 8 Amina buys a book for Rs 275 and sells it at a loss of 15%. How much does she sell it for? C.P = Rs 275 S.P = ? Loss Percentage = 15% πΏπ‘œπ‘ π‘ /(𝐢.𝑃) Γ— 100% = 15% πΏπ‘œπ‘ π‘ /275 = (15%)/(100%) Loss = 15/100 Γ— 275 Loss = 4125/100 Loss = Rs 41.25 Now, Loss = CP βˆ’ SP S.P = C.P βˆ’ Loss = Rs 275 βˆ’ Rs 41.25 = 275 βˆ’ 4125/100 = (27500 βˆ’ 4125)/100 = 23375/100 = 233.75 Thus, she sells it for Rs 233.75

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.