-64.59% is the change from 850 to 301
Calculation steps:
[( 301 - 850 ) ÷ 850] x 100 = -64.59%
Formula
Percentage change = [(301 - 850) / 850] x 100
Subtract the new number by the original number
301 - 850 = -549
-549 ÷ 850 = -0.6458823529411765
-0.6458823529411765 x 100 = -64.59%