-97.2% is the change from 715 to 20
Calculation steps:
[( 20 - 715 ) ÷ 715] x 100 = -97.2%
Formula
Percentage change = [(20 - 715) / 715] x 100
Subtract the new number by the original number
20 - 715 = -695
-695 ÷ 715 = -0.972027972027972
-0.972027972027972 x 100 = -97.2%