-70.62% is the change from 851 to 250
Calculation steps:
[( 250 - 851 ) ÷ 851] x 100 = -70.62%
Formula
Percentage change = [(250 - 851) / 851] x 100
Subtract the new number by the original number
250 - 851 = -601
-601 ÷ 851 = -0.7062279670975323
-0.7062279670975323 x 100 = -70.62%