8300% is the change from 5 to 420
Calculation steps:
[( 420 - 5 ) ÷ 5] x 100 = 8300%
Formula
Percentage change = [(420 - 5) / 5] x 100
Subtract the new number by the original number
420 - 5 = 415
415 ÷ 5 = 83
83 x 100 = 8300%
Example