-21.49% is the change from 870 to 683
Calculation steps:
[( 683 - 870 ) ÷ 870] x 100 = -21.49%
Formula
Percentage change = [(683 - 870) / 870] x 100
Subtract the new number by the original number
683 - 870 = -187
-187 ÷ 870 = -0.2149425287356322
-0.2149425287356322 x 100 = -21.49%