Question

Convert 1,230 minutes to hours.

Answer 1

$1h=60min\to1min=\dfrac{1}{60}h\\\\1,230min=\dfrac{1}{60}\cdot1,230h=\dfrac{1,230}{60}h=\dfrac{123}{6}h=20.5h\\\\Answer:\boxed{20.5}\to\fbox{d.}$

Answer 2

 When converted, 1,230 minutes is 20.5 hours.