-69.5% is the change from 705 to 215
Calculation steps:
[( 215 - 705 ) ÷ 705] x 100 = -69.5%
Formula
Percentage change = [(215 - 705) / 705] x 100
Subtract the new number by the original number
215 - 705 = -490
-490 ÷ 705 = -0.6950354609929078
-0.6950354609929078 x 100 = -69.5%