-67.36% is the change from 821 to 268
Calculation steps:
[( 268 - 821 ) ÷ 821] x 100 = -67.36%
Formula
Percentage change = [(268 - 821) / 821] x 100
Subtract the new number by the original number
268 - 821 = -553
-553 ÷ 821 = -0.6735688185140073
-0.6735688185140073 x 100 = -67.36%