-97.07% is the change from 717 to 21
Calculation steps:
[( 21 - 717 ) ÷ 717] x 100 = -97.07%
Formula
Percentage change = [(21 - 717) / 717] x 100
Subtract the new number by the original number
21 - 717 = -696
-696 ÷ 717 = -0.9707112970711297
-0.9707112970711297 x 100 = -97.07%