-50% is the change from 264 to 132
Calculation steps:
[( 132 - 264 ) ÷ 264] x 100 = -50%
Formula
Percentage change = [(132 - 264) / 264] x 100
Subtract the new number by the original number
132 - 264 = -132
-132 ÷ 264 = -0.5
-0.5 x 100 = -50%
Example