-50.24% is the change from 205 to 102
Calculation steps:
[( 102 - 205 ) ÷ 205] x 100 = -50.24%
Formula
Percentage change = [(102 - 205) / 205] x 100
Subtract the new number by the original number
102 - 205 = -103
-103 ÷ 205 = -0.5024390243902439
-0.5024390243902439 x 100 = -50.24%