-97.34% is the change from 790 to 21
Calculation steps:
[( 21 - 790 ) ÷ 790] x 100 = -97.34%
Formula
Percentage change = [(21 - 790) / 790] x 100
Subtract the new number by the original number
21 - 790 = -769
-769 ÷ 790 = -0.9734177215189873
-0.9734177215189873 x 100 = -97.34%