-77.55% is the change from 294 to 66
Calculation steps:
[( 66 - 294 ) ÷ 294] x 100 = -77.55%
Formula
Percentage change = [(66 - 294) / 294] x 100
Subtract the new number by the original number
66 - 294 = -228
-228 ÷ 294 = -0.7755102040816326
-0.7755102040816326 x 100 = -77.55%