Hello! Please, explain, how it happens. I apply “Change speed” with the settinng -50 %, minus. The origiinal track length is for instance3 min, The new length is expected to be 3+1.5=4.5 min. But the real length after applying is …about 6 min, double.

I can guess, the speed it two times less, 50 % of the original. therefore the lenght is two times more.

Right… If you drive at half the original speed it takes twice as long to get there.

**Sometimes the language can be confusing…** You could have a change **of** or **by** 1% which is a small change **to** 99% or 101% of the original.

Or you could have a huge change **to** 1% of the original and the math is different.

The *Speed Multiplier* is another clue.