-29.54% is the change from 870 to 613
Calculation steps:
[( 613 - 870 ) ÷ 870] x 100 = -29.54%
Formula
Percentage change = [(613 - 870) / 870] x 100
Subtract the new number by the original number
613 - 870 = -257
-257 ÷ 870 = -0.29540229885057473
-0.29540229885057473 x 100 = -29.54%