-10.37% is the change from 270 to 242
Calculation steps:
[( 242 - 270 ) ÷ 270] x 100 = -10.37%
Formula
Percentage change = [(242 - 270) / 270] x 100
Subtract the new number by the original number
242 - 270 = -28
-28 ÷ 270 = -0.1037037037037037
-0.1037037037037037 x 100 = -10.37%