6900% is the change from 6 to 420
Calculation steps:
[( 420 - 6 ) ÷ 6] x 100 = 6900%
Formula
Percentage change = [(420 - 6) / 6] x 100
Subtract the new number by the original number
420 - 6 = 414
414 ÷ 6 = 69
69 x 100 = 6900%
Example