500% is the change from 7 to 42
Calculation steps:
[( 42 - 7 ) ÷ 7] x 100 = 500%
Formula
Percentage change = [(42 - 7) / 7] x 100
Subtract the new number by the original number
42 - 7 = 35
35 ÷ 7 = 5
5 x 100 = 500%
Example