diff --git a/lib/rules/alpha-value-notation/__tests__/index.js b/lib/rules/alpha-value-notation/__tests__/index.js
index 497a6d1d90..abee5d8730 100644
--- a/lib/rules/alpha-value-notation/__tests__/index.js
+++ b/lib/rules/alpha-value-notation/__tests__/index.js
@@ -124,6 +124,22 @@ testRule({
 				{ message: messages.expected('40%', '0.4'), line: 5, column: 29 },
 			],
 		},
+		{
+			code: 'a { opacity: 14% }',
+			fixed: 'a { opacity: 0.14 }',
+			message: messages.expected('14%', '0.14'),
+			line: 1,
+			column: 14,
+			description: 'properly deals with floating-point conversions',
+		},
+		{
+			code: 'a { opacity: 0.3% }',
+			fixed: 'a { opacity: 0.003 }',
+			message: messages.expected('0.3%', '0.003'),
+			line: 1,
+			column: 14,
+			description: 'properly deals with floating-point conversions',
+		},
 	],
 });
 
@@ -199,6 +215,22 @@ testRule({
 				{ message: messages.expected('0.40', '40%'), line: 5, column: 29 },
 			],
 		},
+		{
+			code: 'a { opacity: 0.14 }',
+			fixed: 'a { opacity: 14% }',
+			message: messages.expected('0.14', '14%'),
+			line: 1,
+			column: 14,
+			description: 'properly deals with floating-point conversions',
+		},
+		{
+			code: 'a { opacity: 0.003 }',
+			fixed: 'a { opacity: 0.3% }',
+			message: messages.expected('0.003', '0.3%'),
+			line: 1,
+			column: 14,
+			description: 'properly deals with floating-point conversions',
+		},
 	],
 });
 
diff --git a/lib/rules/alpha-value-notation/index.js b/lib/rules/alpha-value-notation/index.js
index c8c2798f50..45c270c1fb 100644
--- a/lib/rules/alpha-value-notation/index.js
+++ b/lib/rules/alpha-value-notation/index.js
@@ -115,13 +115,13 @@ function rule(primary, options, context) {
 }
 
 function asPercentage(value) {
-	return `${value * 100}%`;
+	return `${Number((value * 100).toPrecision(3))}%`;
 }
 
 function asNumber(value) {
 	const { number } = valueParser.unit(value);
 
-	return number / 100;
+	return Number((number / 100).toPrecision(3));
 }
 
 function findAlphaInValue(node) {