-9.59% is the change from 907 to 820
Calculation steps:
[( 820 - 907 ) ÷ 907] x 100 = -9.59%
Formula
Percentage change = [(820 - 907) / 907] x 100
Subtract the new number by the original number
820 - 907 = -87
-87 ÷ 907 = -0.09592061742006615
-0.09592061742006615 x 100 = -9.59%