Calculate the speed for a car that went a distance of 125 kilometers in 2 hours time.

So you want to get the distance per hour. Now it's per 2 hours, so you want to get it per 1 hour.

You can think of it as dividing the numerator and denominator each by 2.

(125 km/2) / (2 hours / 2)

62.5 km / 1 hour

62.5 km/h