316.8% is the change from 125 to 521
Calculation steps:
[( 521 - 125 ) ÷ 125] x 100 = 316.8%
Formula
Percentage change = [(521 - 125) / 125] x 100
Subtract the new number by the original number
521 - 125 = 396
396 ÷ 125 = 3.168
3.168 x 100 = 316.8%
Example