diff --git a/packages/react/src/components/Table/TableHead/ColumnResize.jsx b/packages/react/src/components/Table/TableHead/ColumnResize.jsx
index 780f1de787..97a34484d2 100644
--- a/packages/react/src/components/Table/TableHead/ColumnResize.jsx
+++ b/packages/react/src/components/Table/TableHead/ColumnResize.jsx
@@ -9,7 +9,7 @@ import { MIN_COLUMN_WIDTH } from './columnWidthUtilityFunctions';
 const propTypes = {
   currentColumnWidths: PropTypes.objectOf(
     PropTypes.shape({
-      width: PropTypes.number,
+      width: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
       id: PropTypes.string,
     })
   ).isRequired,
diff --git a/packages/react/src/components/Table/TableHead/TableHead.jsx b/packages/react/src/components/Table/TableHead/TableHead.jsx
index 8b3a90c16b..bd566def0a 100644
--- a/packages/react/src/components/Table/TableHead/TableHead.jsx
+++ b/packages/react/src/components/Table/TableHead/TableHead.jsx
@@ -490,7 +490,12 @@ const TableHead = ({
       percentageMode &&
       !hasOverflowMenu
     ) {
-      if (hasRowSelection === 'multi' && !(hasRowExpansion || hasRowNesting)) {
+      /* istanbul ignore next */
+      if (
+        (hasRowSelection === 'multi' ||
+          (useRadioButtonSingleSelect && hasRowSelection === 'single')) &&
+        !(hasRowExpansion || hasRowNesting)
+      ) {
         tableWidth = `calc(100% - 54px)`;
         columnWidth = `calc(${tableWidth} / ${totalColumns})`;
       } else if (