-7.66% is the change from 888 to 820
Calculation steps:
[( 820 - 888 ) ÷ 888] x 100 = -7.66%
Formula
Percentage change = [(820 - 888) / 888] x 100
Subtract the new number by the original number
820 - 888 = -68
-68 ÷ 888 = -0.07657657657657657
-0.07657657657657657 x 100 = -7.66%