6900% is the change from 7 to 490
Calculation steps:
[( 490 - 7 ) ÷ 7] x 100 = 6900%
Formula
Percentage change = [(490 - 7) / 7] x 100
Subtract the new number by the original number
490 - 7 = 483
483 ÷ 7 = 69
69 x 100 = 6900%
Example