-69.59% is the change from 845 to 257
Calculation steps:
[( 257 - 845 ) ÷ 845] x 100 = -69.59%
Formula
Percentage change = [(257 - 845) / 845] x 100
Subtract the new number by the original number
257 - 845 = -588
-588 ÷ 845 = -0.6958579881656805
-0.6958579881656805 x 100 = -69.59%