I was told that the quicker I learned to use the metric system the better, or my employment choices would be limited - because the world will change over almost immediately.
That was 1959, haven't seen it yet.
Not specific to metric, but a frequent error in calculations of temperature (like blower discharge temperature change with intercooler) is where they simply divide the new ÷ old to get the change.
It's always much, much smaller than that.
All temperature changes reference absolute zero: Celsius -273° (Kelvin 0°), Fahrenheit -492° (Rankine 0°)
A 100° F drop in temperature from 300° F to 200° F is not 33% lower, but from 760° R to 660° R, or 13% lower
