-75.17% is the change from 870 to 216
Calculation steps:
[( 216 - 870 ) ÷ 870] x 100 = -75.17%
Formula
Percentage change = [(216 - 870) / 870] x 100
Subtract the new number by the original number
216 - 870 = -654
-654 ÷ 870 = -0.7517241379310344
-0.7517241379310344 x 100 = -75.17%