Selina Concise Class 7 Math Chapter 6 Ratio And Proportion Exercise 6B Solution EXERCISE 6B (1) Check whether the following quantities form a proportion or not: (i) 3x × 56 = 7x × 24 ⇒ 168x = 168x Hence, the given four quantities are in proportion. (ii) 0.8 × 9 = 3 × 2.4 ⇒ […]