-91.89% is the change from 370 to 30
Calculation steps:
[( 30 - 370 ) ÷ 370] x 100 = -91.89%
Formula
Percentage change = [(30 - 370) / 370] x 100
Subtract the new number by the original number
30 - 370 = -340
-340 ÷ 370 = -0.918918918918919
-0.918918918918919 x 100 = -91.89%