-84.99% is the change from 813 to 122
Calculation steps:
[( 122 - 813 ) ÷ 813] x 100 = -84.99%
Formula
Percentage change = [(122 - 813) / 813] x 100
Subtract the new number by the original number
122 - 813 = -691
-691 ÷ 813 = -0.8499384993849939
-0.8499384993849939 x 100 = -84.99%