-77.93% is the change from 870 to 192
Calculation steps:
[( 192 - 870 ) ÷ 870] x 100 = -77.93%
Formula
Percentage change = [(192 - 870) / 870] x 100
Subtract the new number by the original number
192 - 870 = -678
-678 ÷ 870 = -0.7793103448275862
-0.7793103448275862 x 100 = -77.93%