-63.57% is the change from 851 to 310
Calculation steps:
[( 310 - 851 ) ÷ 851] x 100 = -63.57%
Formula
Percentage change = [(310 - 851) / 851] x 100
Subtract the new number by the original number
310 - 851 = -541
-541 ÷ 851 = -0.63572267920094
-0.63572267920094 x 100 = -63.57%