1200% is the change from 66 to 858
Calculation steps:
[( 858 - 66 ) ÷ 66] x 100 = 1200%
Formula
Percentage change = [(858 - 66) / 66] x 100
Subtract the new number by the original number
858 - 66 = 792
792 ÷ 66 = 12
12 x 100 = 1200%
Example