309.45% is the change from 127 to 520
Calculation steps:
[( 520 - 127 ) ÷ 127] x 100 = 309.45%
Formula
Percentage change = [(520 - 127) / 127] x 100
Subtract the new number by the original number
520 - 127 = 393
393 ÷ 127 = 3.094488188976378
3.094488188976378 x 100 = 309.45%