-72.88% is the change from 306 to 83
Calculation steps:
[( 83 - 306 ) ÷ 306] x 100 = -72.88%
Formula
Percentage change = [(83 - 306) / 306] x 100
Subtract the new number by the original number
83 - 306 = -223
-223 ÷ 306 = -0.7287581699346405
-0.7287581699346405 x 100 = -72.88%