3120% is the change from 30 to 966
Calculation steps:
[( 966 - 30 ) ÷ 30] x 100 = 3120%
Formula
Percentage change = [(966 - 30) / 30] x 100
Subtract the new number by the original number
966 - 30 = 936
936 ÷ 30 = 31.2
31.2 x 100 = 3120%
Example