-91.33% is the change from 346 to 30
Calculation steps:
[( 30 - 346 ) ÷ 346] x 100 = -91.33%
Formula
Percentage change = [(30 - 346) / 346] x 100
Subtract the new number by the original number
30 - 346 = -316
-316 ÷ 346 = -0.9132947976878613
-0.9132947976878613 x 100 = -91.33%