-67.03% is the change from 828 to 273
Calculation steps:
[( 273 - 828 ) ÷ 828] x 100 = -67.03%
Formula
Percentage change = [(273 - 828) / 828] x 100
Subtract the new number by the original number
273 - 828 = -555
-555 ÷ 828 = -0.6702898550724637
-0.6702898550724637 x 100 = -67.03%