-69.93% is the change from 715 to 215
Calculation steps:
[( 215 - 715 ) ÷ 715] x 100 = -69.93%
Formula
Percentage change = [(215 - 715) / 715] x 100
Subtract the new number by the original number
215 - 715 = -500
-500 ÷ 715 = -0.6993006993006993
-0.6993006993006993 x 100 = -69.93%