-21.98% is the change from 910 to 710
Calculation steps:
[( 710 - 910 ) ÷ 910] x 100 = -21.98%
Formula
Percentage change = [(710 - 910) / 910] x 100
Subtract the new number by the original number
710 - 910 = -200
-200 ÷ 910 = -0.21978021978021978
-0.21978021978021978 x 100 = -21.98%