-82.1% is the change from 715 to 128
Calculation steps:
[( 128 - 715 ) ÷ 715] x 100 = -82.1%
Formula
Percentage change = [(128 - 715) / 715] x 100
Subtract the new number by the original number
128 - 715 = -587
-587 ÷ 715 = -0.820979020979021
-0.820979020979021 x 100 = -82.1%