-69.63% is the change from 270 to 82
Calculation steps:
[( 82 - 270 ) ÷ 270] x 100 = -69.63%
Formula
Percentage change = [(82 - 270) / 270] x 100
Subtract the new number by the original number
82 - 270 = -188
-188 ÷ 270 = -0.6962962962962963
-0.6962962962962963 x 100 = -69.63%