2.05 Number Rounding

Four number rounding methods have been identified for inclusion in this data book.

Type-1: The higher integral multiple is selected as rounded number

nnn.0 through nnn.4 round to nnn	ex. 123.4 --> 123
nnn.5 through nnn.9 round to nn(n+1)	ex. 123.5 --> 124
nnn.nn0 through nnn.nn4 round to nnn.nn	ex. 123.454 --> 123.45
nnn.nn5 through nnn.nn9 round to nnn.n(n+1)	ex. 123.455 --> 123.46

(ISO 31-0:1992 Annex B B.3 rule B)

Type-2: The even integral multiple is selected as the rounded number

ex. 123.45 --> 123.4

and 123.55 --> 123.6

(ISO 31-0:1992 Annex B B.3 rule A)

Type-3:

nnn.nn1 and nnn.nn2 round to nnn.nn0	ex. 123,452 --> 123.450
nnn.nn3 through nnn.nn7 round to nnn.nn5	ex. 123.454 --> 123.455
nnn.nn8 and nnn.nn9 round to nnn.n(n+1)0	ex. 123.458 --> 123.460

Type-4:

nn.(n-1)76 through nn.n25 round to nn.n0	ex. 123.325 --> 123.30
nn.n26 through nn.n75 round to nn.n5	ex. 123.326 --> 123.35 and 123.376 --> 123.40

China	CNA	1
Hong Kong	HKG	1
India	IND	1
Indonesia	INA	1
Japan	JPN	1
Korea	KOR	1
Malaysia	MAS	1
Philippines	PHI	1
Singapore	SIN	1
Thailand	THI	1

rem-1:	Above country data are not considered any CEILING and/or FLOOR types of rounding.
	Those are rather application (such as Accounting/Taxing) dependent rounding.
	CEILING: 123.011 --> 123.02
	FLOOR: 123.019 --> 123.01
rem-2:	Related standards: ISO 30-0, IS 2, JIS Z 8401, KS A 0021

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