-74.64% is the change from 840 to 213
Calculation steps:
[( 213 - 840 ) ÷ 840] x 100 = -74.64%
Formula
Percentage change = [(213 - 840) / 840] x 100
Subtract the new number by the original number
213 - 840 = -627
-627 ÷ 840 = -0.7464285714285714
-0.7464285714285714 x 100 = -74.64%