-36.21% is the change from 870 to 555
Calculation steps:
[( 555 - 870 ) ÷ 870] x 100 = -36.21%
Formula
Percentage change = [(555 - 870) / 870] x 100
Subtract the new number by the original number
555 - 870 = -315
-315 ÷ 870 = -0.3620689655172414
-0.3620689655172414 x 100 = -36.21%