3133.33% is the change from 15 to 485
Calculation steps:
[( 485 - 15 ) ÷ 15] x 100 = 3133.33%
Formula
Percentage change = [(485 - 15) / 15] x 100
Subtract the new number by the original number
485 - 15 = 470
470 ÷ 15 = 31.333333333333332
31.333333333333332 x 100 = 3133.33%