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The value of x in theexpression28.52 is x% of 77.5 is,⇒Now, let us assume that,Anumber28.52 is x% of 77.5.Where x is any number.Hence, themathmatical formof the expression is,⇒Simplify the expression for x,⇒Multiplyby 100 on both sides,⇒⇒Divide by 77.5 on both sides,⇒⇒So, Thenumber28.52 is 36.8% of 77.5.Learn more about thepercentvisit:brainly.com/question/24877689#SPJ6...