-77.66% is the change from 855 to 191
Calculation steps:
[( 191 - 855 ) ÷ 855] x 100 = -77.66%
Formula
Percentage change = [(191 - 855) / 855] x 100
Subtract the new number by the original number
191 - 855 = -664
-664 ÷ 855 = -0.776608187134503
-0.776608187134503 x 100 = -77.66%