Metric or imperial doesn't really make a difference here.
Say the recipe is for five things and you want to make twelve.
You've got the same scaling problem no matter how you measure. You don't get "metric eggs", so solving "it needs two eggs for five so how many eggs for twelve" is the same.
Say the recipe is for five things and you want to make twelve.
You've got the same scaling problem no matter how you measure. You don't get "metric eggs", so solving "it needs two eggs for five so how many eggs for twelve" is the same.