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@atoponce If we're looking to be exact, that's incorrect. In fact, 16C equals 60.8F, and 28C equals 82.4F.

The two scales line up on whole-number equivalents every 5C (or 9F, which is the same thing). Thus 20C=68F, 15C=59F, &c., so 16C and 28C can't line up exactly with F.

The difference between C and F is the difference between decimal and sexagesimal; one divides freezing -> boiling into 100 degrees, and the other divides that interval into 180. Thus C/F = 5 to 9.