-40.92% is the change from 457 to 270
Calculation steps:
[( 270 - 457 ) ÷ 457] x 100 = -40.92%
Formula
Percentage change = [(270 - 457) / 457] x 100
Subtract the new number by the original number
270 - 457 = -187
-187 ÷ 457 = -0.40919037199124725
-0.40919037199124725 x 100 = -40.92%