Divide by 3 to each ingredient (gives you a third) and then multiply your answer by two (gives you 2/3). For example, 2 divided by 3 is 2/3, multiply by two and get 1 1/3 t of butter. For the fruits, 4 divided by 3 is 4/3, simplified is 1 1/3, multiply by 2 and get 2 2/3.
The given amount of ingredients are needed to make 'one recipe', Therefore to make 2/3 of the recipe, the required quantity of each ingredient will be multiplied by 2/3 to get: