-64.16% is the change from 851 to 305
Calculation steps:
[( 305 - 851 ) ÷ 851] x 100 = -64.16%
Formula
Percentage change = [(305 - 851) / 851] x 100
Subtract the new number by the original number
305 - 851 = -546
-546 ÷ 851 = -0.6415981198589894
-0.6415981198589894 x 100 = -64.16%