-30.46% is the change from 870 to 605
Calculation steps:
[( 605 - 870 ) ÷ 870] x 100 = -30.46%
Formula
Percentage change = [(605 - 870) / 870] x 100
Subtract the new number by the original number
605 - 870 = -265
-265 ÷ 870 = -0.3045977011494253
-0.3045977011494253 x 100 = -30.46%