[ryanSrich]

Hm. This looks cool, but doesn't solve my most common use case - percentage increases. Example - https://i.imgur.com/LrnUwnB.png

[xlii]

Few weeks ago on HN there was a post about RPN calculator so I decided to get (both as an apps in form of Free42 and physical device) and learn one (for fun and giggles). It’s one of the best gadget I got in a very long time. I absolutely love it and every single time I see a calculation problem I make a simple program for it.

So for your most common use case that would be:

  00 { 18-Byte Prgm }
  01▸LBL "%INC"
  02 X<>Y
  03 ÷
  04 1
  05 -
  06 100
  07 ×
  08 END

If you do calculations often (or just are a geek who likes new toys) I thoroughly recommend one.

[WA]

Here, I use this for Numi:

    buy = 20
    sell = 219
    gain = sell - buy
    performance = gain / buy * 100
    amount = 500
    capital_invested = amount * buy
    capital_returned = amount * sell
    capital_gain = amount * gain