-91.55% is the change from 355 to 30
Calculation steps:
[( 30 - 355 ) ÷ 355] x 100 = -91.55%
Formula
Percentage change = [(30 - 355) / 355] x 100
Subtract the new number by the original number
30 - 355 = -325
-325 ÷ 355 = -0.9154929577464789
-0.9154929577464789 x 100 = -91.55%