-34.94% is the change from 870 to 566
Calculation steps:
[( 566 - 870 ) ÷ 870] x 100 = -34.94%
Formula
Percentage change = [(566 - 870) / 870] x 100
Subtract the new number by the original number
566 - 870 = -304
-304 ÷ 870 = -0.34942528735632183
-0.34942528735632183 x 100 = -34.94%