• ColeSloth@discuss.tchncs.de
      link
      fedilink
      arrow-up
      3
      ·
      8 hours ago

      it’s very often not useful. Like, what’s 6% of 80? See. Still hard.

      Also, with the 6% of 50 example it’s easy without using this trick.

      What’s 6% of 100? 6, right? So cut 100 in half to get to 50, and cut the 6 in half to get the 3. Cut the 50 in half again and cut the 3 in half again, and you’ll also know that 6% of 25 is 1.5.

      Which also lets you know that 6% of 75 is 4.5. the 3 from the 50, plus the 1.5 from the 25. or just know to split the difference between the 3 at 50 and the 6 at 100.

      A lot of math is just tricks for a thinking process.

        • ColeSloth@discuss.tchncs.de
          link
          fedilink
          arrow-up
          1
          ·
          1 hour ago

          It’s stupid simple… If you know 6% of one hundred is 6, then you should know 6% of 50 is 3. You just cut each number in half.