-92.63% is the change from 407 to 30
Calculation steps:
[( 30 - 407 ) ÷ 407] x 100 = -92.63%
Formula
Percentage change = [(30 - 407) / 407] x 100
Subtract the new number by the original number
30 - 407 = -377
-377 ÷ 407 = -0.9262899262899262
-0.9262899262899262 x 100 = -92.63%