math - Negative & Positive Percentage Calculation

Question

Let's say i have 3 sets of numbers and i want the % of their difference.

30 - 60
94 - 67
10 - 14

I want a function that calculate the percentage of the difference between each 2 numbers, and the most important is to support positive and negative percentages.

Example:

30 - 60 : +100%
94 - 67 : -36% ( just guessing )
10 - 14 : +40%

Thanks

Answer 1

This is pretty basic math.

% difference from x to y is 100*(y-x)/x