3137.5% is the change from 16 to 518
Calculation steps:
[( 518 - 16 ) ÷ 16] x 100 = 3137.5%
Formula
Percentage change = [(518 - 16) / 16] x 100
Subtract the new number by the original number
518 - 16 = 502
502 ÷ 16 = 31.375
31.375 x 100 = 3137.5%
Example