-94.08% is the change from 355 to 21
Calculation steps:
[( 21 - 355 ) ÷ 355] x 100 = -94.08%
Formula
Percentage change = [(21 - 355) / 355] x 100
Subtract the new number by the original number
21 - 355 = -334
-334 ÷ 355 = -0.9408450704225352
-0.9408450704225352 x 100 = -94.08%