1159.09% is the change from 66 to 831
Calculation steps:
[( 831 - 66 ) ÷ 66] x 100 = 1159.09%
Formula
Percentage change = [(831 - 66) / 66] x 100
Subtract the new number by the original number
831 - 66 = 765
765 ÷ 66 = 11.590909090909092
11.590909090909092 x 100 = 1159.09%