-11.48% is the change from 305 to 270
Calculation steps:
[( 270 - 305 ) ÷ 305] x 100 = -11.48%
Formula
Percentage change = [(270 - 305) / 305] x 100
Subtract the new number by the original number
270 - 305 = -35
-35 ÷ 305 = -0.11475409836065574
-0.11475409836065574 x 100 = -11.48%