-56.9% is the change from 710 to 306
Calculation steps:
[( 306 - 710 ) ÷ 710] x 100 = -56.9%
Formula
Percentage change = [(306 - 710) / 710] x 100
Subtract the new number by the original number
306 - 710 = -404
-404 ÷ 710 = -0.5690140845070423
-0.5690140845070423 x 100 = -56.9%