-94.9% is the change from 412 to 21
Calculation steps:
[( 21 - 412 ) ÷ 412] x 100 = -94.9%
Formula
Percentage change = [(21 - 412) / 412] x 100
Subtract the new number by the original number
21 - 412 = -391
-391 ÷ 412 = -0.9490291262135923
-0.9490291262135923 x 100 = -94.9%