Page 2Two numbers are respectively 30 percent and 40 percent less than a third number. What percent is the second of the first? Let the third number = x = `(100x - 30x)/(100)` = `(70x)/(100)` = `(7x)/(10)` Second number = `x - (40x)/(100)` = `(100x -40x)/(100)` = `(60x)/(100)` = `(6x)/(10)` ∴ Required % = `((6x)/(10))/((7x)/(10))xx 100` = `(6x)/(10) xx (10)/(7x) xx 100` = `(600)/(7)` = 85`(5)/(7)%` Concept: Concept of Percent and Percentage Is there an error in this question or solution? Open in App Suggest Corrections |