-97.79% is the change from 951 to 21
Calculation steps:
[( 21 - 951 ) ÷ 951] x 100 = -97.79%
Formula
Percentage change = [(21 - 951) / 951] x 100
Subtract the new number by the original number
21 - 951 = -930
-930 ÷ 951 = -0.9779179810725552
-0.9779179810725552 x 100 = -97.79%