19.34% is the change from 512 to 611
Calculation steps:
[( 611 - 512 ) ÷ 512] x 100 = 19.34%
Formula
Percentage change = [(611 - 512) / 512] x 100
Subtract the new number by the original number
611 - 512 = 99
99 ÷ 512 = 0.193359375
0.193359375 x 100 = 19.34%