-93.73% is the change from 335 to 21
Calculation steps:
[( 21 - 335 ) ÷ 335] x 100 = -93.73%
Formula
Percentage change = [(21 - 335) / 335] x 100
Subtract the new number by the original number
21 - 335 = -314
-314 ÷ 335 = -0.9373134328358209
-0.9373134328358209 x 100 = -93.73%