-97.04% is the change from 709 to 21
Calculation steps:
[( 21 - 709 ) ÷ 709] x 100 = -97.04%
Formula
Percentage change = [(21 - 709) / 709] x 100
Subtract the new number by the original number
21 - 709 = -688
-688 ÷ 709 = -0.9703808180535967
-0.9703808180535967 x 100 = -97.04%