-54.53% is the change from 673 to 306
Calculation steps:
[( 306 - 673 ) ÷ 673] x 100 = -54.53%
Formula
Percentage change = [(306 - 673) / 673] x 100
Subtract the new number by the original number
306 - 673 = -367
-367 ÷ 673 = -0.5453194650817236
-0.5453194650817236 x 100 = -54.53%