-71.56% is the change from 851 to 242
Calculation steps:
[( 242 - 851 ) ÷ 851] x 100 = -71.56%
Formula
Percentage change = [(242 - 851) / 851] x 100
Subtract the new number by the original number
242 - 851 = -609
-609 ÷ 851 = -0.7156286721504113
-0.7156286721504113 x 100 = -71.56%