Find how many more are needed to reach the target.<br><br>
&bull; Cups in the box = 11<br>
&bull; Target number of cups = 19<br>
&bull; More cups needed = 19 &minus; 11 = 8<br><br>
8 more cups are needed to make 19.<br>
Check: 11 + 8 = 19 &#10003;