-69.72% is the change from 710 to 215
Calculation steps:
[( 215 - 710 ) ÷ 710] x 100 = -69.72%
Formula
Percentage change = [(215 - 710) / 710] x 100
Subtract the new number by the original number
215 - 710 = -495
-495 ÷ 710 = -0.6971830985915493
-0.6971830985915493 x 100 = -69.72%