Alfred, Nick and Mark share a cake.<br>Nick eats $$ \frac{1}{5}$$ of the cake.<br>Mark eats $$ \frac{3}{10}$$ of the cake.<br>The rest is eaten by Alfred.<br>$$ \frac{A}{B}$$ (in lowest terms) of cake was eaten by Alfred. <hr>A: <input min="0" type="number" class="lineinput" placeholder="?" /><br>B: <input min="0" type="number" class="lineinput" placeholder="?" />