Ratios always deal with calorie %'s not grams because fat has twice as many calories per gram as carbs or protein. Beware the 70% fat and 30% protein ratio mentioned is a ketogenic diet. People haphazardly suggest this type of diet to anyone who wants to lose weight.
A good ratio is anywhere from 40/30/30(pro/carb/fat), to 50/30/20, to 33/33/33, etc... In general I think some carb limiting is in order, however a ketogenic diet is more extreme and you should only bother if you can't get results any other way or you find that way of eating enticing. I highly doubt you'd see much of a difference between the above ratios since they are all in the same ballpark. Just make sure you get plenty of protein, limited carbs and enough good fats and you can't go wrong.