-55.65% is the change from 690 to 306
Calculation steps:
[( 306 - 690 ) ÷ 690] x 100 = -55.65%
Formula
Percentage change = [(306 - 690) / 690] x 100
Subtract the new number by the original number
306 - 690 = -384
-384 ÷ 690 = -0.5565217391304348
-0.5565217391304348 x 100 = -55.65%