-15.75% is the change from 851 to 717
Calculation steps:
[( 717 - 851 ) ÷ 851] x 100 = -15.75%
Formula
Percentage change = [(717 - 851) / 851] x 100
Subtract the new number by the original number
717 - 851 = -134
-134 ÷ 851 = -0.15746180963572268
-0.15746180963572268 x 100 = -15.75%