lowest regular season win percentage by nba champion

The Washington Bullets have the worst winning percentage by a team with more than 0 championships in a season, winning 53.7 percent of the time in 1977-78.

Interpreted as:

lowest regular season win percentage by NBA champion in a season

	TEAM	W%	CHAMPS	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Bullets	.537	1	1977-78	82	241.8	110.3	50.8	23.8	8.1	4.7	43.7	94.8	46.1				23.0	32.4	71.1	50.6	16.5	34.3	19.7	19,830	9,047	4,164	1,948	668	386	1,613	1,879
2	Hawks	.569	1	1957-58	72	240.7	107.5	75.6	21.4			38.6	99.5	38.8				30.3	42.3	71.5	45.5				17,330	7,738	5,445	1,541				1,875
3	Rockets	.573	1	1994-95	82	240.6	103.5	40.5	25.1	8.8	6.3	38.5	80.2	48.0	7.9	21.4	36.8	18.6	24.9	74.9	56.8	10.7	29.8	16.1	19,730	8,491	3,320	2,060	721	514	1,322	1,714
4	Bullets	.583	1	1947-48	48	241.6	74.4		6.7			26.8	89.2	30.1				20.7	30.1	68.9	36.3				11,595	3,570		320				1,080
5	Warriors	.583	1	1946-47	60	240.4	68.6		5.7			25.2	89.7	28.0				18.3	26.6	68.8	33.8				14,425	4,118		343				1,082
6	Warriors	.585	1	1974-75	82	241.2	108.5	52.1	25.3	11.9	4.5	45.3	97.3	46.5				17.9	23.4	76.8	50.4	17.3	34.8	20.9	19,780	8,898	4,270	2,076	972	365	1,716	2,109
7	Celtics	.585	1	1968-69	82	241.8	111.0	59.0	23.8			43.7	101.4	43.1				23.6	32.4	72.9	48.0				19,830	9,102	4,840	1,953				2,073
8	Nationals	.597	1	1954-55	72	240.7	91.1	54.6	24.7			32.8	88.1	37.2				25.5	34.0	75.0	44.2				17,330	6,557	3,933	1,778				1,658
9	Trail Blazers	.598	1	1976-77	82	240.6	111.7	48.3	24.3	10.6	6.0	44.2	91.9	48.1				23.4	30.7	76.2	53.0	15.4	33.0	21.4	19,730	9,163	3,963	1,990	868	492	1,757	2,220
10	Royals	.603	1	1950-51	68	247.0	84.6	44.3	20.1			29.9	79.1	37.8				24.9	33.1	75.3	45.2				16,795	5,756	3,015	1,368				1,534
11	Lakers	.606	1	1951-52	66	247.2	85.6	53.7	21.0			31.9	86.9	36.7				21.8	29.1	74.8	42.9				16,315	5,648	3,543	1,389				1,763
12	Celtics	.611	1	1956-57	72	241.4	105.5	68.9	20.3			39.0	101.8	38.3				27.5	36.7	75.0	44.8				17,380	7,599	4,963	1,464				1,851
13	Warriors	.625	1	1955-56	72	241.0	103.1	60.6	26.2			36.7	89.4	41.0				29.8	39.3	75.7	48.3				17,355	7,424	4,362	1,886				1,872
14	Heat	.634	1	2005-06	82	240.9	99.9	43.1	20.6	6.4	5.4	37.1	77.5	47.8	6.1	17.6	34.5	19.7	28.2	70.0	55.6	10.5	32.6	14.5	19,755	8,191	3,533	1,692	522	442	1,186	1,871
15	SuperSonics	.634	1	1978-79	82	240.9	106.6	47.6	24.1	8.4	4.9	42.7	91.3	46.8				21.1	28.0	75.4	51.4	16.0	31.6	19.3	19,755	8,740	3,901	1,973	690	398	1,586	1,914
16	Bucks	.639	1	2020-21	72	240.7	120.1	48.1	25.5	8.1	4.6	44.7	91.8	48.7	14.4	37.1	38.9	16.2	21.4	76.0	59.3	10.3	37.8	13.8	17,330	8,649	3,465	1,834	585	334	995	1,244
17	Lakers	.639	1	1953-54	72	241.7	81.7	52.1	18.4			30.3	80.6	37.6				21.0	28.7	73.1	43.8				17,405	5,880	3,752	1,323				1,918
18	Nuggets	.646	1	2022-23	82	240.9	115.8	43.0	28.9	7.5	4.5	43.6	86.4	50.4	11.8	31.2	37.9	16.8	22.4	75.1	60.1	10.1	32.9	14.5	19,755	9,495	3,527	2,368	618	368	1,192	1,525
19	Warriors	.646	1	2021-22	82	240.6	111.0	45.5	27.1	8.8	4.5	40.5	86.4	46.9	14.3	39.4	36.4	15.6	20.3	76.9	58.2	9.8	35.7	14.9	19,730	9,102	3,730	2,223	719	372	1,221	1,723
20	Pistons	.659	1	2003-04	82	241.2	90.1	42.8	20.8	8.0	7.0	33.5	77.0	43.5	4.1	11.8	34.4	19.0	25.3	75.3	51.1	12.4	30.4	15.1	19,780	7,388	3,506	1,702	659	570	1,241	1,664
21	Celtics	.659	1	1975-76	82	240.9	106.2	52.9	24.1	6.8	3.2	43.0	96.4	44.6				20.2	25.9	78.0	49.3	16.7	36.2	19.6	19,755	8,708	4,341	1,980	561	260	1,609	2,002
22	Celtics	.659	1	1967-68	82	240.3	116.1	69.1	21.9			45.0	102.1	44.0				26.2	36.4	72.1	49.2				19,705	9,523	5,666	1,798				2,147
23	Celtics	.675	1	1965-66	80	240.3	112.7	69.9	22.4			43.6	104.6	41.7				25.5	34.5	73.9	47.0				19,225	9,014	5,591	1,795				2,012
24	Lakers	.683	1	2000-01	82	242.7	100.6	44.7	23.0	6.9	6.0	37.9	81.5	46.5	5.4	15.5	34.4	19.4	28.5	68.3	53.5	13.2	31.5	14.4	19,905	8,251	3,668	1,888	564	490	1,184	1,872
25	Celtics	.683	1	1973-74	82	241.2	109.0	54.3	26.7	6.8	3.7	44.3	97.2	45.6				20.5	25.6	80.0	50.3	16.8	37.5	21.9	19,780	8,937	4,452	2,187	561	305	1,796	1,868