-31.54% is the change from 447 to 306
Calculation steps:
[( 306 - 447 ) ÷ 447] x 100 = -31.54%
Formula
Percentage change = [(306 - 447) / 447] x 100
Subtract the new number by the original number
306 - 447 = -141
-141 ÷ 447 = -0.31543624161073824
-0.31543624161073824 x 100 = -31.54%