-39.17% is the change from 457 to 278
Calculation steps:
[( 278 - 457 ) ÷ 457] x 100 = -39.17%
Formula
Percentage change = [(278 - 457) / 457] x 100
Subtract the new number by the original number
278 - 457 = -179
-179 ÷ 457 = -0.3916849015317287
-0.3916849015317287 x 100 = -39.17%