-89.7% is the change from 709 to 73
Calculation steps:
[( 73 - 709 ) ÷ 709] x 100 = -89.7%
Formula
Percentage change = [(73 - 709) / 709] x 100
Subtract the new number by the original number
73 - 709 = -636
-636 ÷ 709 = -0.8970380818053597
-0.8970380818053597 x 100 = -89.7%