-93.71% is the change from 334 to 21
Calculation steps:
[( 21 - 334 ) ÷ 334] x 100 = -93.71%
Formula
Percentage change = [(21 - 334) / 334] x 100
Subtract the new number by the original number
21 - 334 = -313
-313 ÷ 334 = -0.937125748502994
-0.937125748502994 x 100 = -93.71%