-69.62% is the change from 846 to 257
Calculation steps:
[( 257 - 846 ) ÷ 846] x 100 = -69.62%
Formula
Percentage change = [(257 - 846) / 846] x 100
Subtract the new number by the original number
257 - 846 = -589
-589 ÷ 846 = -0.6962174940898345
-0.6962174940898345 x 100 = -69.62%