-30.99% is the change from 710 to 490
Calculation steps:
[( 490 - 710 ) ÷ 710] x 100 = -30.99%
Formula
Percentage change = [(490 - 710) / 710] x 100
Subtract the new number by the original number
490 - 710 = -220
-220 ÷ 710 = -0.30985915492957744
-0.30985915492957744 x 100 = -30.99%