-39.81% is the change from 427 to 257
Calculation steps:
[( 257 - 427 ) ÷ 427] x 100 = -39.81%
Formula
Percentage change = [(257 - 427) / 427] x 100
Subtract the new number by the original number
257 - 427 = -170
-170 ÷ 427 = -0.3981264637002342
-0.3981264637002342 x 100 = -39.81%