• TAYRN@lemmy.world
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    1 year ago

    …I mean, yeah? If the number is 50 or 10 that works out great. But let’s try that with 7% of 13. Now it’s 13% of 7. Just like you said, “much easier to calculate.”

    Okay, choosing prime numbers was intentionally mean on my part. But 3% of 9 becomes 9% of 3. 4% of 2 becomes 2% of 4. Can anyone honestly look me in the eye and tell me that this tip has helped them out in any meaningful way?

    • Tikiporch@lemmy.world
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      1 year ago

      Well, single digit percentages are easy. If it helps, move your decimal to the right so 9% becomes 90%. You can probably calculate 90% of 3 because you can do 10% and subtract it and get 2.7. Now move your decimal back to the left and you get 9% of 3 which is 0.27. You can do the same with higher percentages once you learn to break them in to 10% pieces.

        • Mr_Dr_Oink@lemmy.world
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          1 year ago

          This is not mental gymnastics.

          This is a coherent method and makes a lot of sense.

          Mental gymnastics is when someone has to lie to themselves to make a point that isn’t correct. Like when people argue that trump was a good president because they can list several good things he did.

          Or when people claim something is mental gymnastics when it’s actually called maths.

    • 1847953620@lemmy.world
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      1 year ago

      Yes, idiot. Choosing instances of when it’s less helpful (arguably) doesn’t negate the cases where it is deemed very helpful.