-92.25% is the change from 387 to 30
Calculation steps:
[( 30 - 387 ) ÷ 387] x 100 = -92.25%
Formula
Percentage change = [(30 - 387) / 387] x 100
Subtract the new number by the original number
30 - 387 = -357
-357 ÷ 387 = -0.9224806201550387
-0.9224806201550387 x 100 = -92.25%