-94.05% is the change from 353 to 21
Calculation steps:
[( 21 - 353 ) ÷ 353] x 100 = -94.05%
Formula
Percentage change = [(21 - 353) / 353] x 100
Subtract the new number by the original number
21 - 353 = -332
-332 ÷ 353 = -0.9405099150141643
-0.9405099150141643 x 100 = -94.05%