-58.55% is the change from 620 to 257
Calculation steps:
[( 257 - 620 ) ÷ 620] x 100 = -58.55%
Formula
Percentage change = [(257 - 620) / 620] x 100
Subtract the new number by the original number
257 - 620 = -363
-363 ÷ 620 = -0.5854838709677419
-0.5854838709677419 x 100 = -58.55%