-77.7% is the change from 296 to 66
Calculation steps:
[( 66 - 296 ) ÷ 296] x 100 = -77.7%
Formula
Percentage change = [(66 - 296) / 296] x 100
Subtract the new number by the original number
66 - 296 = -230
-230 ÷ 296 = -0.777027027027027
-0.777027027027027 x 100 = -77.7%