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The panzer has spoken (sh.itjust.works)
submitted 2 years ago by to c/memes@lemmy.ml
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[–] 3 points 2 years ago* (last edited 2 years ago) (1 child)

Easy way to do %

Say you want 6% of 45

Seems hard right?

1% of 45 is .45

.45 × 6 =

.4 × 6 = 2.4

.05 × 6 = .3

2.4 + .3 = 2.7

So 6% of 45 is 2.7

Extra:

Say you want an item that is 40 dollars and it is 20% off.

10% is 4 dollars.

20% is 8 dollars.

So item would be 32 dollars.

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  • [–] 11 points 2 years ago

    that's a shitload of lines of math to write out/work in your head. I learned percentages of x as: 6 * 45 / 100 = x (2.7) If you picture both as fractions, you multiply the opposite and then divide by the other number to get the missing one (x). Hopefully Lemmy renders this well...
    6 x
    100 45

    The way I learned it was multiply diagonally and then divide by whatever is opposite diagonally to x.

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