Hi james,
You have it correct in your first example . If the Fat to protein ratio is 60 % that would be equivalent to 6 parts fat / 10 parts protein. How this would play out then is for a food with as fed 24 % protein the fat content would be 60% of that
24 x .6 = 14.4 the ratio would 14.4/24 = .6 expressed as a percentage 60%
In the examples that Pugs mom gave you Wellness Core reduced fat 11% fat / 37% protein = 29.7% which is why she said ~ 30% The percentage of calories from fat is about 25% when those numbers are plugged into the balance it converter.
For B/D 19% protein and 16% fat the FTP ratio is 16/19 = .84 or84% However the % calories from fat are not 84%, she misspoke, the percent calories contributed from fat using the balance it converter is ~34% calories
For the Wellness dog food review the 42% fat to protein ratio was calculated using their avg fat content of 16% and their avg protein content of 38% 16%/38% = .421 or 42%
What does it mean? Well the higher the fat to protein ratio is, it can mean that the % of calories that are coming from fat may be higher than expected and percent of calories from protein lower than you might expect when looking at the GA or dry matter basis alone. For example a food with 35% protein and 40 % fat a ratio of 1.1 it may appear to be a high protein food but 25% of the calories are coming from protein and ~70% from fat.
Hope that helps
