532.1% is the change from 81 to 512
Calculation steps:
[( 512 - 81 ) ÷ 81] x 100 = 532.1%
Formula
Percentage change = [(512 - 81) / 81] x 100
Subtract the new number by the original number
512 - 81 = 431
431 ÷ 81 = 5.320987654320987
5.320987654320987 x 100 = 532.1%