A mother prepares oat porridge for her children.<br>For every 2 cups of oats, she will use 6 cups of water. <hr> Find the ratio of the number of cups of oats used to the number of cups of water used. Express your answer in the lowest term.&nbsp;<br> <input min="0" type="number" id="imp6pg082q2_1" class="lineinput" placeholder="?"> : <input min="0" type="number" id="imp6pg082q2_2" class="lineinput" placeholder="?">