What is the rate of the reaction for 2A→B ?

Rate = Change in some quanityTime taken for the change =ΔxΔt Rate of reaction for 2A→B Expression of rateConsider the following reaction between A and B2A→B The average rate of reaction can be expressed either by decrease of concentration of any ane of the reactant (A) or by the increase in concentration of any one of the products(B).Thus,−12Δ[A]Δt=Δ[B]Δt Where, Δ[A] = Change in concentration of AΔ[B] = Change in concentration of  BΔt = time interval