nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Ratio</span>.ratio&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;approx_ratio_exp&nbsp;:&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Ratio</span>.ratio&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;float_of_rational_string&nbsp;:&nbsp;<span class="constructor"