-57.94% is the change from 611 to 257
Calculation steps:
[( 257 - 611 ) ÷ 611] x 100 = -57.94%
Formula
Percentage change = [(257 - 611) / 611] x 100
Subtract the new number by the original number
257 - 611 = -354
-354 ÷ 611 = -0.5793780687397708
-0.5793780687397708 x 100 = -57.94%