-75% is the change from 264 to 66
Calculation steps:
[( 66 - 264 ) ÷ 264] x 100 = -75%
Formula
Percentage change = [(66 - 264) / 264] x 100
Subtract the new number by the original number
66 - 264 = -198
-198 ÷ 264 = -0.75
-0.75 x 100 = -75%
Example