<p>The diffrernce   <span class="math-editor mathquill-rendered-math"><span class="fraction non-leaf"><span class="numerator">3</span><span class="denominator">4</span><span style="display: inline-block; width: 0;"> </span></span><span class="binary-operator">−</span><span class="fraction non-leaf"><span class="numerator">1</span><span class="denominator">2</span><span style="display: inline-block; width: 0;"> </span></span></span>  is </p>