-23.6% is the change from 877 to 670
Calculation steps:
[( 670 - 877 ) ÷ 877] x 100 = -23.6%
Formula
Percentage change = [(670 - 877) / 877] x 100
Subtract the new number by the original number
670 - 877 = -207
-207 ÷ 877 = -0.23603192702394526
-0.23603192702394526 x 100 = -23.6%