379.8% is the change from 99 to 475
Calculation steps:
[( 475 - 99 ) ÷ 99] x 100 = 379.8%
Formula
Percentage change = [(475 - 99) / 99] x 100
Subtract the new number by the original number
475 - 99 = 376
376 ÷ 99 = 3.797979797979798
3.797979797979798 x 100 = 379.8%