-30.19% is the change from 924 to 645
Calculation steps:
[( 645 - 924 ) ÷ 924] x 100 = -30.19%
Formula
Percentage change = [(645 - 924) / 924] x 100
Subtract the new number by the original number
645 - 924 = -279
-279 ÷ 924 = -0.30194805194805197
-0.30194805194805197 x 100 = -30.19%