-97.06% is the change from 715 to 21
Calculation steps:
[( 21 - 715 ) ÷ 715] x 100 = -97.06%
Formula
Percentage change = [(21 - 715) / 715] x 100
Subtract the new number by the original number
21 - 715 = -694
-694 ÷ 715 = -0.9706293706293706
-0.9706293706293706 x 100 = -97.06%