1230.3% is the change from 66 to 878
Calculation steps:
[( 878 - 66 ) ÷ 66] x 100 = 1230.3%
Formula
Percentage change = [(878 - 66) / 66] x 100
Subtract the new number by the original number
878 - 66 = 812
812 ÷ 66 = 12.303030303030303
12.303030303030303 x 100 = 1230.3%