-97.25% is the change from 764 to 21
Calculation steps:
[( 21 - 764 ) ÷ 764] x 100 = -97.25%
Formula
Percentage change = [(21 - 764) / 764] x 100
Subtract the new number by the original number
21 - 764 = -743
-743 ÷ 764 = -0.9725130890052356
-0.9725130890052356 x 100 = -97.25%