-53.92% is the change from 664 to 306
Calculation steps:
[( 306 - 664 ) ÷ 664] x 100 = -53.92%
Formula
Percentage change = [(306 - 664) / 664] x 100
Subtract the new number by the original number
306 - 664 = -358
-358 ÷ 664 = -0.5391566265060241
-0.5391566265060241 x 100 = -53.92%