-72.84% is the change from 939 to 255
Calculation steps:
[( 255 - 939 ) ÷ 939] x 100 = -72.84%
Formula
Percentage change = [(255 - 939) / 939] x 100
Subtract the new number by the original number
255 - 939 = -684
-684 ÷ 939 = -0.7284345047923323
-0.7284345047923323 x 100 = -72.84%