-91.8% is the change from 366 to 30
Calculation steps:
[( 30 - 366 ) ÷ 366] x 100 = -91.8%
Formula
Percentage change = [(30 - 366) / 366] x 100
Subtract the new number by the original number
30 - 366 = -336
-336 ÷ 366 = -0.9180327868852459
-0.9180327868852459 x 100 = -91.8%