-72.4% is the change from 924 to 255
Calculation steps:
[( 255 - 924 ) ÷ 924] x 100 = -72.4%
Formula
Percentage change = [(255 - 924) / 924] x 100
Subtract the new number by the original number
255 - 924 = -669
-669 ÷ 924 = -0.724025974025974
-0.724025974025974 x 100 = -72.4%