-77.93% is the change from 299 to 66
Calculation steps:
[( 66 - 299 ) ÷ 299] x 100 = -77.93%
Formula
Percentage change = [(66 - 299) / 299] x 100
Subtract the new number by the original number
66 - 299 = -233
-233 ÷ 299 = -0.7792642140468228
-0.7792642140468228 x 100 = -77.93%