Two sizes of seaweed plants are growing in a cove. Due to changing water temperature, the bigger seaweed plants are thriving while the smaller plants are dying out. There were originally 25 large seaweed plants and 300 small seaweed plants. The large seaweed is increasing in number by 2% a year and the smaller plant is decreasing by 6% a year. When will the number of each type of plant be equal?