-67.05% is the change from 780 to 257
Calculation steps:
[( 257 - 780 ) ÷ 780] x 100 = -67.05%
Formula
Percentage change = [(257 - 780) / 780] x 100
Subtract the new number by the original number
257 - 780 = -523
-523 ÷ 780 = -0.6705128205128205
-0.6705128205128205 x 100 = -67.05%