-88.89% is the change from 306 to 34
Calculation steps:
[( 34 - 306 ) ÷ 306] x 100 = -88.89%
Formula
Percentage change = [(34 - 306) / 306] x 100
Subtract the new number by the original number
34 - 306 = -272
-272 ÷ 306 = -0.8888888888888888
-0.8888888888888888 x 100 = -88.89%