I guess this reveals how fucking dumb I am. I can’t get the math to make sense in my head. If you watch at 1.25 speed, logically (or illogically I guess) I assume that this makes the video 1/4 shorter, but that isn’t correct.
In short, could someone reexplain how fractions and decimals work? Lol
Edit: thank you all, I understand now. You helped me reorient my thinking.
In: 8653
Let’s say you’re watching a video at 1.25 speed. That means for every one second you watch, you cover 1.25 second’s worth of video. Double it: in two seconds, you’ve watched 2.5 second’s worth of video. Double it: in 4 seconds of your life, 5 seconds have ticked by on the progress bar. Last time, let’s double it: if we watch the video for 8 seconds at 1.25 speed, we’ll have moved 10 seconds along the progress bar. If the video was 10 seconds long, then it took us 8 seconds to watch. That’s a 20% reduction in runtime. If the video was 10 minutes long, it would’ve taken us 80% of 10 minutes, or 8 minutes, to watch it at 1.25 speed: a 20% reduction in runtime.
Now we watch the video at 1.5 speed. In 1 second, we cover 1.5 seconds on the progress bar. Double it: in 2 seconds, we’ve watched 3 second’s worth of the video. Double it: in 4 seconds, we’ve watched 6 seconds of the video according to the progress bar. Now multiply it by 10: in 40 seconds, we’ll watch 60 second’s, or 1 minute’s, worth of the video. It takes us 2/3 of one minute in real time to consume 1 minute of the video according to the progress bar. That’s a 33% reduction in runtime. A 10 minute, or 600 second, video takes us 2/3 of 10 minutes, or 400 seconds, to watch at 1.5 speed: a 33% reduction in runtime.
Others are correct about inverting fractions, but when I’m struggling to understand something I like to either go big or start small. In this case, starting small and building up to round numbers that I can portion out in my head helped me out, and hopefully it helps out someone else, too.
Latest Answers