-69.91% is the change from 339 to 102
Calculation steps:
[( 102 - 339 ) ÷ 339] x 100 = -69.91%
Formula
Percentage change = [(102 - 339) / 339] x 100
Subtract the new number by the original number
102 - 339 = -237
-237 ÷ 339 = -0.6991150442477876
-0.6991150442477876 x 100 = -69.91%