377.06% is the change from 109 to 520
Calculation steps:
[( 520 - 109 ) ÷ 109] x 100 = 377.06%
Formula
Percentage change = [(520 - 109) / 109] x 100
Subtract the new number by the original number
520 - 109 = 411
411 ÷ 109 = 3.770642201834862
3.770642201834862 x 100 = 377.06%