Methanol is to be produced by the reaction of carbon dioxide and hydrogen.

$C{O}_2+3H_{2}C{H}_{3}OH+H_{2}O$

The feed to the reactor and the products obtained are shown in the following diagram.

What is the fractional conversion of $C{O}_2?$

$70\%$

$53\%$

$43\%$

$30\%$

$20\%$