Rounding

To annular to n cogent figures:

If the aboriginal non-significant amount is a 5 followed by added non-zero digits, annular up the endure cogent amount (away from zero). For example, 1.2459 as the aftereffect of a adding or altitude that alone allows for 3 cogent abstracts should be accounting 1.25.

If the aboriginal non-significant amount is a 5 not followed by any added digits or followed alone by zeros, rounding requires a tie-breaking rule. For example, to annular 1.25 to 2 cogent figures, Annular bisected up circuit up to 1.3, while Annular bisected to even circuit to the abutting even amount 1.2.

Replace any non-significant abstracts by zeros.