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8.The marks in a test decreased from 50 to 40. The percentage decrease is *

Answer» 25%Step-by-step explanation:GIVEN:- original marks=40  decreased marks=30  to find:-%decrease  We KNOW that:-  decreased marks=Original marks-Decreased marks  =40-30  =10  w.k.t:-  decreased%=decreased (100) %  original  =10/40 (100) %    =1000%/40    =25%


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