-75.4% is the change from 870 to 214
Calculation steps:
[( 214 - 870 ) ÷ 870] x 100 = -75.4%
Formula
Percentage change = [(214 - 870) / 870] x 100
Subtract the new number by the original number
214 - 870 = -656
-656 ÷ 870 = -0.7540229885057471
-0.7540229885057471 x 100 = -75.4%