To do this, we pick the first unit and convert Picking m first and converting to km: Since we're converting from a non-prefix to a prefix, we divide the value by the prefix were taking it to. In this case, kilo = 10³ which means we're going to divide our value by 1000 to convert it from m to km 340 m/s ÷ 1000 = 0.34 km/s Now, let's convert our seconds to hour: We'll need to calculate how many hours is equivalent to one second first; 1 hr = 60×60 seconds X hr = 1 second *Cross multiply* 1 × 1 = X × 60 × 60 1 = 3,600 X X = 1 / 3,600 X = 2.778×10⁻⁴ hour So, in the place of "1 Second", we're going to be inserting 2.778×10⁻⁴ hour instead 0.34 km / s = 0.34 km / 2.778×10⁻⁴ hour (0.34 / 2.778×10⁻⁴) km/hour 1,224 km/h. 340 m/s = 1,224 km/h
