-68.46% is the change from 856 to 270
Calculation steps:
[( 270 - 856 ) ÷ 856] x 100 = -68.46%
Formula
Percentage change = [(270 - 856) / 856] x 100
Subtract the new number by the original number
270 - 856 = -586
-586 ÷ 856 = -0.6845794392523364
-0.6845794392523364 x 100 = -68.46%