-31.35% is the change from 909 to 624
Calculation steps:
[( 624 - 909 ) ÷ 909] x 100 = -31.35%
Formula
Percentage change = [(624 - 909) / 909] x 100
Subtract the new number by the original number
624 - 909 = -285
-285 ÷ 909 = -0.31353135313531355
-0.31353135313531355 x 100 = -31.35%