-91.71% is the change from 820 to 68
Calculation steps:
[( 68 - 820 ) ÷ 820] x 100 = -91.71%
Formula
Percentage change = [(68 - 820) / 820] x 100
Subtract the new number by the original number
68 - 820 = -752
-752 ÷ 820 = -0.9170731707317074
-0.9170731707317074 x 100 = -91.71%