-97.05% is the change from 711 to 21
Calculation steps:
[( 21 - 711 ) ÷ 711] x 100 = -97.05%
Formula
Percentage change = [(21 - 711) / 711] x 100
Subtract the new number by the original number
21 - 711 = -690
-690 ÷ 711 = -0.9704641350210971
-0.9704641350210971 x 100 = -97.05%