-30.42% is the change from 927 to 645
Calculation steps:
[( 645 - 927 ) ÷ 927] x 100 = -30.42%
Formula
Percentage change = [(645 - 927) / 927] x 100
Subtract the new number by the original number
645 - 927 = -282
-282 ÷ 927 = -0.3042071197411003
-0.3042071197411003 x 100 = -30.42%