-70.82% is the change from 257 to 75
Calculation steps:
[( 75 - 257 ) ÷ 257] x 100 = -70.82%
Formula
Percentage change = [(75 - 257) / 257] x 100
Subtract the new number by the original number
75 - 257 = -182
-182 ÷ 257 = -0.708171206225681
-0.708171206225681 x 100 = -70.82%