-29% is the change from 431 to 306
Calculation steps:
[( 306 - 431 ) ÷ 431] x 100 = -29%
Formula
Percentage change = [(306 - 431) / 431] x 100
Subtract the new number by the original number
306 - 431 = -125
-125 ÷ 431 = -0.2900232018561485
-0.2900232018561485 x 100 = -29%