The phrase "highest possible rating" is correct and commonly used in written English.
Example: "The restaurant received the highest possible rating from the food critic for its exceptional dishes and service."
Airline Ratings today ranks Korean Air seven stars for safety, the highest possible rating, and the same for product.
Careful analysis of the standards verifies that they align with those in the highest-performing countries on international comparisons, and they have received the highest possible rating for content and rigor from the conservative Fordham Institute, a tireless advocate for higher standards.
You answered my question perfectly," and gave Thomas the highest possible rating.
It was signed "Maryrosh". His son gave the book five stars -- the highest possible rating.
Its digital-only edition got the highest possible rating from Romantic Times, the genre's trade magazine.
"Their feeling was to keep it limited and get the highest possible rating," he said.
The players from around world, including nine of the 14 rated as 10-goalers -- the highest possible rating.
The mayor pays a federal tax rate of 34.69 percent, just shy of the highest possible rate, before deducting for his significant charitable contributions.
This meant that IndyMac could not accept so-called brokered deposits, large amounts of money from investors looking for the highest possible rates of return.
So as the Super Bowl weekend approaches, he said, some hotels are still "betting on a certain amount of last-minute business at the highest possible rates".
At the dealership, the ultimate decision about a loan's cost is left to the discretion of an employee who profits immediately by charging the highest possible rate, even though the dealer has no money at risk.
