-68.06% is the change from 623 to 199
Calculation steps:
[( 199 - 623 ) ÷ 623] x 100 = -68.06%
Formula
Percentage change = [(199 - 623) / 623] x 100
Subtract the new number by the original number
199 - 623 = -424
-424 ÷ 623 = -0.680577849117175
-0.680577849117175 x 100 = -68.06%