-33.68% is the change from 870 to 577
Calculation steps:
[( 577 - 870 ) ÷ 870] x 100 = -33.68%
Formula
Percentage change = [(577 - 870) / 870] x 100
Subtract the new number by the original number
577 - 870 = -293
-293 ÷ 870 = -0.3367816091954023
-0.3367816091954023 x 100 = -33.68%