-1.59% is the change from 820 to 807
Calculation steps:
[( 807 - 820 ) ÷ 820] x 100 = -1.59%
Formula
Percentage change = [(807 - 820) / 820] x 100
Subtract the new number by the original number
807 - 820 = -13
-13 ÷ 820 = -0.015853658536585366
-0.015853658536585366 x 100 = -1.59%