-23.66% is the change from 820 to 626
Calculation steps:
[( 626 - 820 ) ÷ 820] x 100 = -23.66%
Formula
Percentage change = [(626 - 820) / 820] x 100
Subtract the new number by the original number
626 - 820 = -194
-194 ÷ 820 = -0.23658536585365852
-0.23658536585365852 x 100 = -23.66%