-15.39% is the change from 851 to 720
Calculation steps:
[( 720 - 851 ) ÷ 851] x 100 = -15.39%
Formula
Percentage change = [(720 - 851) / 851] x 100
Subtract the new number by the original number
720 - 851 = -131
-131 ÷ 851 = -0.15393654524089306
-0.15393654524089306 x 100 = -15.39%