-78.17% is the change from 623 to 136
Calculation steps:
[( 136 - 623 ) ÷ 623] x 100 = -78.17%
Formula
Percentage change = [(136 - 623) / 623] x 100
Subtract the new number by the original number
136 - 623 = -487
-487 ÷ 623 = -0.7817014446227929
-0.7817014446227929 x 100 = -78.17%