-28.82% is the change from 850 to 605
Calculation steps:
[( 605 - 850 ) ÷ 850] x 100 = -28.82%
Formula
Percentage change = [(605 - 850) / 850] x 100
Subtract the new number by the original number
605 - 850 = -245
-245 ÷ 850 = -0.28823529411764703
-0.28823529411764703 x 100 = -28.82%