20% is the change from 425 to 510
Calculation steps:
[( 510 - 425 ) ÷ 425] x 100 = 20%
Formula
Percentage change = [(510 - 425) / 425] x 100
Subtract the new number by the original number
510 - 425 = 85
85 ÷ 425 = 0.2
0.2 x 100 = 20%
Example