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This communication describes the Homotopy Perturbation Method with Laplace Transform (LT-HPM), which is used to solve the chemical kinetics problem analytically investigated. This technique is used to solve the chemical kinetics problem in bromine. Coupled nonlinear ordinary differential equations form this problem. In this perturbation method, the solution is obtained in the approximate form with easily computed components. The Laplace transform used to accelerate the convergence of the power series, and the results are shown in the graphs, which have good agreement with the other existing method in the literature. The results show that LTHPM is very effective and easy to implement.