4962.5% is the change from 8 to 405
Calculation steps:
[( 405 - 8 ) ÷ 8] x 100 = 4962.5%
Formula
Percentage change = [(405 - 8) / 8] x 100
Subtract the new number by the original number
405 - 8 = 397
397 ÷ 8 = 49.625
49.625 x 100 = 4962.5%
Example