In this paper, we study new results regarding the existence, uniqueness and convergence of the solution of nonlinear fractional Volterra integrodifferential equations via Caputo-Fabrizio operator. The main results of this paper are based on the Banach contraction principle. Furthermore, we investigate the approximate analytical solutions of the proposed problem using a new combination method called Khalouta decomposition method. Some illustrated examples of our results are provided with some numerical simulations of the solutions.
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