-54.26% is the change from 669 to 306
Calculation steps:
[( 306 - 669 ) ÷ 669] x 100 = -54.26%
Formula
Percentage change = [(306 - 669) / 669] x 100
Subtract the new number by the original number
306 - 669 = -363
-363 ÷ 669 = -0.5426008968609866
-0.5426008968609866 x 100 = -54.26%