4 ms·

600/1.2 = 500 I think it’s correct? Now I’m confused too Edit: yup was wrong. Read reply for right calculations.

• hansvm 5y ago
  Typically "20% savings" would mean that you save 20% of the initial value. 20% x $600 = $120, not $100. I.e., you should multiply by (1-0.2), not divide by (1+0.2). Edit: That has the undesirable property that common English sentences don't cancel out like you'd expect -- if you lower the price by 20% then raise it by 20% you don't end up where you started. Unfortunately, that problem doesn't go away whether "increasing/decreasing by x%" always refers to the former or the latter price; you'd require that it target's the former price in one direction and the latter price in the other, which IMO is even less intuitive than the status quo.
• nemoniac 5y ago
  600 * (1 - 0.20) = 480
  • marshall2016 5y ago
    Good catch, I just updated it to 16% off. (600 - 500) / 600 = ~16.7% rounded down.