Give your equation a name eg. Click the AutoFormat As You Type tab and uncheck the Hyphens - with dash box. Now to insert a numbered equation click on the equation button and choose Numbered Equation from the menu.
Click the anchor at the bottom-right corner of the Captions group on the Kutools Plus tab.
Select the Insert tab on the ribbon. Click References Insert Caption. This method works in Office 2010 2013 and 2016. Numbered Equation under Category choose Create New Category and provide a name starting with AAA.