-97.78% is the change from 945 to 21
Calculation steps:
[( 21 - 945 ) ÷ 945] x 100 = -97.78%
Formula
Percentage change = [(21 - 945) / 945] x 100
Subtract the new number by the original number
21 - 945 = -924
-924 ÷ 945 = -0.9777777777777777
-0.9777777777777777 x 100 = -97.78%