The year number stops meaning quantity: a comparison, a share of a hundred, and a value below zero.
The answer key prints on a separate page.
Sixth grade is three reversals in one year, and this paper takes them one section at a time. A ratio is a comparison rather than an amount; a percent is that comparison fixed at a hundred; and an integer is a number that can sit below nothing at all. None of the three is hard arithmetic and all three are conceptual turns, which is why the sections are short and none of them is a drill.
Ratios and percents are adjacent on purpose. 3 : 4, 3/4 and 75% are one relationship in three notations, and grade six is when a child is expected to move between them without re-deriving each one. A paper that tests them in separate sittings never shows whether that movement is there.
