-77.98% is the change from 840 to 185
Calculation steps:
[( 185 - 840 ) ÷ 840] x 100 = -77.98%
Formula
Percentage change = [(185 - 840) / 840] x 100
Subtract the new number by the original number
185 - 840 = -655
-655 ÷ 840 = -0.7797619047619048
-0.7797619047619048 x 100 = -77.98%