-62.18% is the change from 870 to 329
Calculation steps:
[( 329 - 870 ) ÷ 870] x 100 = -62.18%
Formula
Percentage change = [(329 - 870) / 870] x 100
Subtract the new number by the original number
329 - 870 = -541
-541 ÷ 870 = -0.6218390804597701
-0.6218390804597701 x 100 = -62.18%