-74.52% is the change from 840 to 214
Calculation steps:
[( 214 - 840 ) ÷ 840] x 100 = -74.52%
Formula
Percentage change = [(214 - 840) / 840] x 100
Subtract the new number by the original number
214 - 840 = -626
-626 ÷ 840 = -0.7452380952380953
-0.7452380952380953 x 100 = -74.52%