-66.84% is the change from 775 to 257
Calculation steps:
[( 257 - 775 ) ÷ 775] x 100 = -66.84%
Formula
Percentage change = [(257 - 775) / 775] x 100
Subtract the new number by the original number
257 - 775 = -518
-518 ÷ 775 = -0.6683870967741935
-0.6683870967741935 x 100 = -66.84%