-80.12% is the change from 840 to 167
Calculation steps:
[( 167 - 840 ) ÷ 840] x 100 = -80.12%
Formula
Percentage change = [(167 - 840) / 840] x 100
Subtract the new number by the original number
167 - 840 = -673
-673 ÷ 840 = -0.8011904761904762
-0.8011904761904762 x 100 = -80.12%