diff --git a/Sources/Number/Double+NYPLAdditions.swift b/Sources/Number/Double+NYPLAdditions.swift
new file mode 100644
index 0000000..6ec0fce
--- /dev/null
+++ b/Sources/Number/Double+NYPLAdditions.swift
@@ -0,0 +1,22 @@
+//
+//  Created by Ettore Pasquini on 11/29/24.
+//  Copyright © 2024 The New York Public Library. All Rights Reserved.
+//
+
+import Foundation
+
+infix operator =~= : ComparisonPrecedence
+
+public extension Double {
+
+  /// Performs equality check minus an epsilon
+  /// - Returns: `true` if the numbers differ by less than the epsilon,
+  /// `false` otherwise.
+  static func =~= (a: Double, b: Double?) -> Bool {
+    guard let b = b else {
+      return false
+    }
+
+    return abs(a - b) < Double.ulpOfOne
+  }
+}
diff --git a/Sources/Number/Float+NYPLAdditions.swift b/Sources/Number/Float+NYPLAdditions.swift
deleted file mode 100644
index 817e4f3..0000000
--- a/Sources/Number/Float+NYPLAdditions.swift
+++ /dev/null
@@ -1,30 +0,0 @@
-//
-//  StdLib+NYPLAdditions.swift
-//  Simplified
-//
-//  Created by Ettore Pasquini on 6/17/20.
-//  Copyright © 2020 NYPL. All rights reserved.
-//
-
-import Foundation
-
-infix operator =~= : ComparisonPrecedence
-
-public extension Float {
-
-  /// Performs equality check minus an epsilon
-  /// - Returns: `true` if the numbers differ by less than the epsilon,
-  /// `false` otherwise.
-  static func =~= (a: Float, b: Float?) -> Bool {
-    guard let b = b else {
-      return false
-    }
-
-    return abs(a - b) < Float.ulpOfOne
-  }
-
-  func roundTo(decimalPlaces: Int) -> String {
-    return String(format: "%.\(decimalPlaces)f%%", self) as String
-  }
-}
-