Abstract
One of the most important applications of exponential functions involves growth and decay models. These equations have been solved by using many methods. Same has been solved by using Laplace Transform, Sumudu Transform, Sawi Transform, Tarig Transform, Aboodh Transform and Kamal Transform, Kushre transform, etc. In this paper we use recently developed HY Transform for solving exponential growth and decay problems. Some problems are solved by using HY transform, this shows that HY transform is useful and effective for solving such equations.