1700% is the change from 28 to 504
Calculation steps:
[( 504 - 28 ) ÷ 28] x 100 = 1700%
Formula
Percentage change = [(504 - 28) / 28] x 100
Subtract the new number by the original number
504 - 28 = 476
476 ÷ 28 = 17
17 x 100 = 1700%
Example