-67.72% is the change from 855 to 276
Calculation steps:
[( 276 - 855 ) ÷ 855] x 100 = -67.72%
Formula
Percentage change = [(276 - 855) / 855] x 100
Subtract the new number by the original number
276 - 855 = -579
-579 ÷ 855 = -0.6771929824561403
-0.6771929824561403 x 100 = -67.72%