2642.11% is the change from 19 to 521
Calculation steps:
[( 521 - 19 ) ÷ 19] x 100 = 2642.11%
Formula
Percentage change = [(521 - 19) / 19] x 100
Subtract the new number by the original number
521 - 19 = 502
502 ÷ 19 = 26.42105263157895
26.42105263157895 x 100 = 2642.11%