-64.04% is the change from 851 to 306
Calculation steps:
[( 306 - 851 ) ÷ 851] x 100 = -64.04%
Formula
Percentage change = [(306 - 851) / 851] x 100
Subtract the new number by the original number
306 - 851 = -545
-545 ÷ 851 = -0.6404230317273796
-0.6404230317273796 x 100 = -64.04%