-92.27% is the change from 388 to 30
Calculation steps:
[( 30 - 388 ) ÷ 388] x 100 = -92.27%
Formula
Percentage change = [(30 - 388) / 388] x 100
Subtract the new number by the original number
30 - 388 = -358
-358 ÷ 388 = -0.9226804123711341
-0.9226804123711341 x 100 = -92.27%