Archive for the 'tips' Category

Calculating percentage increase and decrease

How do you calculate a percentage increase or decrease for one of your holdings (without using portfolio software you cheaters)? For some reason, I always have to look this one up. Apparently grade school math can fade a bit over time.

Something else that changes over time – the teachers get cuter. I dated a teacher recently and it was pretty strange to think about. Lecherous old man-dom here I come.

OK, back to the task at hand.

Let's use the example of needing to calculate the percentage increase of 11 to 21.

1. The first step is to find the difference between the two numbers: 21 – 11 = 10
2. Take the result of that and divide it by the original number: 10 / 11 = .90909091
3. Multiply this last number by 100. Voila! Your increase from 11 to 21 is 91%!


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